Modeling with Functions Part 1

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ProfRobBob

ProfRobBob

Күн бұрын

Пікірлер: 121
@evandroaraujo5206
@evandroaraujo5206 7 жыл бұрын
People like you should win the noble prize of peace of mind
@profrobbob
@profrobbob 7 жыл бұрын
You are always so appreciative Evandro...THANKS!
@profrobbob
@profrobbob 11 жыл бұрын
You're welcome. I still find it amazing that I can teach students in the Philippines from a room in Florida:) Thanks for liking and choosing my channel to learn from! Please continue to share it with others and help make my channel the number one choice for free math help on KZbin in the Philippines:D
@imnotme8711
@imnotme8711 Жыл бұрын
Yooooo im here in the phil midterms are near and you are a big lifesaver
@Egguu
@Egguu 4 жыл бұрын
This man must know he is still helping people 10 years after.
@leadfurball387
@leadfurball387 4 жыл бұрын
yes
@profrobbob
@profrobbob 4 жыл бұрын
Thanks for tuning in...glad I could help! Please help us keep helping others by ;liking, subbing, sharing thru social medias and with your friends, classmates and teachers...BAM!!!
@Claypiqen
@Claypiqen 11 жыл бұрын
You taught me in 15 minutes what my teacher couldn't in an hour.
@pu090
@pu090 7 жыл бұрын
Have never seen a teacher as energetic as you
@profrobbob
@profrobbob 7 жыл бұрын
It helps when you love what you do:) Thanks for liking and watching...please sub and share too:D
@ateneo1D
@ateneo1D 11 жыл бұрын
Thank you soooo much! i'm a fourth year high school student in the Philippines and this video really helped me understand the topic =)
@elena911000
@elena911000 12 жыл бұрын
Word problems are challenging for me. But Mr. Profrobbob explains and illustrates so wonderful! I love it!
@deepakm9342
@deepakm9342 8 жыл бұрын
I have also started teaching after working for 29 yrs as an engineer. I am inspired by your way of solving problems and also keeping the viewers smiling. Great teaching !
@pocketpin5275
@pocketpin5275 4 жыл бұрын
I wish I had teachers as enthusiastic with teaching as you are
@profrobbob
@profrobbob 4 жыл бұрын
All you have to do is like, subscribe and share this channel with all your friends and classmates so all of you can have ProfRobBob as your KZbin teacher...BAM!!!
@MrGMXander
@MrGMXander 13 жыл бұрын
Great video and subscribed, if only i found this video sooner, just had a test on topic and i was stumped throughout the test. You are one of the few youtube teachers that go at the perfect pace, assuming students know the simple parts and explaining the others. I will be sure to keep watch with your videos to complement the precalculus course I am in.Seeing your join date is august 2011, I hope you can find success here and continue making math videos to help a lot of people.
@67lawi
@67lawi 13 жыл бұрын
Thank you sooo much !! im from saudi arabia and i've been taking calculus for business and the modeling and optimization part is just killing me this is soo helpful !
@profrobbob
@profrobbob 11 жыл бұрын
That's great news...sometimes it just takes a different way of explaining:) Thanks for liking and I hope you come back for more!
@sinless
@sinless 7 ай бұрын
man that ending was hilarious. fastest FOIL speedrun ever??? BAM.
@profrobbob
@profrobbob 6 ай бұрын
@sinless Back in the day when I had a 15 minute time limit.
@profrobbob
@profrobbob 12 жыл бұрын
Get the color version CX or CX CAS. Check with your school and what calculators are allowed on the standardized tests you will need to take. The CAS version may not be allowed.
@fourleafpoker9102
@fourleafpoker9102 10 жыл бұрын
I've been watching your videos since last semester. I'm just going to drop a little note of appreciation here. :)
@profrobbob
@profrobbob 10 жыл бұрын
THANKS for taking the time to send your appreciation FourLeafPoker and thanks for watching! You can continue to show your appreciation by liking, subbing and sharing my channel with others...BAM!!!
@profrobbob
@profrobbob 11 жыл бұрын
Didn't mean to scare you...just trying to get your attention!...thanks for watching!
@sheikhmahmud1024
@sheikhmahmud1024 3 жыл бұрын
Nicely demonstrated. Now I am definitely motivated to relearn functions.
@profrobbob
@profrobbob 3 жыл бұрын
Thank you for the compliment! Since its taken me so long to get to these comments I hope you are enjoying your decision to relearn fractions...check my Algebra 1 playlist if you haven't started already:)
@georgesadler7830
@georgesadler7830 2 жыл бұрын
Professor RobBob ,thank you for a great video /lecture on Mathematical Modeling with Functions Part I. Applied Mathematics starts with these kinds of math problems.
@daytimeempire8804
@daytimeempire8804 10 жыл бұрын
Mr. Tarrou, you are the shit! My man! Keep making these videos. You are literally the only guy on youtube that I watch math tutorials from algebra to calculus. Try to go advanced as you can, like up to calculus 2. I'm in precalc this semester at the moment. Keep it up good sir. You are currently the math king on KZbin! :D
@profrobbob
@profrobbob 13 жыл бұрын
@WilliamJCrocker Yes I currently teach out of Blitzer Precalculus. It is a very good book. It is relatively easy to read, lots of examples, and problems to choose from.
@profrobbob
@profrobbob 13 жыл бұрын
@WilliamJCrocker This video has multiple parts...increasing in difficulty as they go. If you would like an example of a particular question, I can attempt to make a version that may help.
@profrobbob
@profrobbob 13 жыл бұрын
@67lawi That is great to hear. Though I am only teaching PreCalculus at the moment, my new textbook seemed to have very similar problems to the Calculus book our school uses. I was really excited about that. So, I am glad to hear I am able to help Calculus students as well...and from Saudi Arabia! Very cool:)
@profrobbob
@profrobbob 13 жыл бұрын
@MrGMXander Thank you very much. I am really enjoying this new project of mine, though the extra time it is taking is taxing at times. Comments like yours is making it all worth while..and my own students who are now making sure I keep posting these videos this year:) I hope you do well in your PreCalc class this year and that my video continue to be helpful.
@akino.3192
@akino.3192 7 жыл бұрын
Great teacher. I am hooked.
@profrobbob
@profrobbob 7 жыл бұрын
Wow...you have already watched more videos than most! Wish all my students were so motivated...BAM!!!
@shawnthrizethah8424
@shawnthrizethah8424 4 жыл бұрын
I feel like it's just the same as going to school while I'm am actually at home thanks to you sir! 😊
@profrobbob
@profrobbob 4 жыл бұрын
That's great to hear! Thanks for watching and please take the time to like, sub and share this free resource with your teacher so they can share it with the math department so ALL the rest of the "at home" students know where to find free help during these trying times...BAM!!!
@profrobbob
@profrobbob 12 жыл бұрын
I love that you are learning from my videos...and hard work:) Thanks
@derekmiltimore6220
@derekmiltimore6220 7 жыл бұрын
Using this video to recap some modeling before my first exam this evening. Let's hope it helps. I'm going to watch this and then hit the tutoring center for an hour and a half to go over the review sheet.
@profrobbob
@profrobbob 7 жыл бұрын
I hope it helped you pass that exam like BAM!!!...and if it did, please take the time to like, subscribe and share my channel in the student tutoring center so other students might benefit from this free study resource too:D
@rosettejuico5687
@rosettejuico5687 4 жыл бұрын
really helped me a lot..my modules frustrate me but thanks to you sir..i can understand everything now 😊🤓👍
@profrobbob
@profrobbob 4 жыл бұрын
Glad I could help and thanks for watching and subbing! I hope you will share this free resource with your classmates and especially your teacher so all the students in your school know where to find me...BAM!!!
@jmcabel2060
@jmcabel2060 5 ай бұрын
I'M CONFUSED ON HOW TO DO THE EQUATION BUT THIS HELPED ME, THANK YOUU!!
@profrobbob
@profrobbob 13 жыл бұрын
@wtfsaywat Thank you very much:) Good luck with your test tomorrow! With these videos I can sort of be your teacher. I am going to continue making these videos all year.
@Jaystezz
@Jaystezz 2 жыл бұрын
Just started this class today haven’t been to school since 2015 (graduated HS in 1999) it’s intimidating.
@profrobbob
@profrobbob 2 жыл бұрын
Good for you...never too late to learn they say:) I hope you are still finding this channel helpful...don't forget to like and subscribe too..BAM!!!
@darkzeus691
@darkzeus691 4 жыл бұрын
This was a life saver. Thanks.
@profrobbob
@profrobbob 4 жыл бұрын
You're welcome and thanks for watching and subbing!...please keep sharing too:D
@kislaygaurav5596
@kislaygaurav5596 11 жыл бұрын
sir . u r great ... i am an india .....come 2 india sometime ..... i will guide u every where... i mean all places .. i am a student of economics.. all your videos are of great importance 2 me... god bless you...
@amila8512
@amila8512 10 жыл бұрын
You are a great explainer.i love these clips,just one word "excellent"..
@profrobbob
@profrobbob 10 жыл бұрын
THANKS!
@profrobbob
@profrobbob 13 жыл бұрын
@WilliamJCrocker ok...thanks.
@profrobbob
@profrobbob 11 жыл бұрын
My wife and I have our passports and 2 months off...LOL Thank you for such an awesome comment and invitation...I will be spending most of the summer making Calculus videos and preparing to teach it at my school for the first time next school year. I'm happy to hear that my videos are helping you with your math education...I still can't believe that I am teaching a student in India from my home in Florida! Please stay in touch and keep me posted on your progress now that you've subscribed:D
@zooqanpawar1902
@zooqanpawar1902 2 жыл бұрын
( theses videos r 10 yrs old ) started watching in 2023. Amazing lectures and very helpful. Thnxs a lot !
@profrobbob
@profrobbob 12 жыл бұрын
Happy I could help!...and you're welcome:)
@profrobbob
@profrobbob 10 жыл бұрын
Part 1 of a three part lesson for #precalculus
@ElNick09
@ElNick09 6 жыл бұрын
This is superb lecturing.
@profrobbob
@profrobbob 6 жыл бұрын
THANKS for studying and subbing...please spread the word to help us keep growing:D
@profrobbob
@profrobbob 13 жыл бұрын
@WilliamJCrocker Your welcome. You won't many of my example in your book, but the order of the videos should match:)
@nikodoes1249
@nikodoes1249 4 жыл бұрын
im doing precalc online due to covid and this video has saved me, i’ve never understood word problems in alg 1&2😌✨
@profrobbob
@profrobbob 4 жыл бұрын
I am glad you found this video so helpful. Here are my PreCalculus lessons organized by chapter and topic, www.profrobbob.com/pre-calculus Together we will earn that A in your PreCalc class! BAM:D PS...please share this channel info with all your classmates and especially your teacher so all students learning from home know how to find us...BAM!!!
@kaylaquintero8363
@kaylaquintero8363 3 жыл бұрын
Teachers on KZbin >>>
@profrobbob
@profrobbob 3 жыл бұрын
I hope that's a good thing! Wish I had time to make new videos but this dual teaching takes up all my free time...hope you are still finding these videos helpful during these trying times:)
@WilliamJCrocker
@WilliamJCrocker 12 жыл бұрын
What TI Nspire do you recommend ? Txx WJC.
@bevblueroyalpriesthood4361
@bevblueroyalpriesthood4361 6 жыл бұрын
I would like to know whether this is mathematical modeling lecture e.g population models, difference equations and differencial equations? If not where can I find lectures on mathematical modeling?
@kodiak9664
@kodiak9664 9 жыл бұрын
I wish you were my teacher...
@profrobbob
@profrobbob 9 жыл бұрын
+Peace 420 all you have to do is subscribe and I can be your KZbin teacher anytime, 24/7...BAM!!!
@WilliamJCrocker
@WilliamJCrocker 13 жыл бұрын
Are you using Blitzer text book? Tx
@sumaveerabhadraiah1758
@sumaveerabhadraiah1758 9 жыл бұрын
Wonderful Lessons!
@profrobbob
@profrobbob 9 жыл бұрын
+sum shekar thanks for your continued viewership!
@brianahideleon6698
@brianahideleon6698 9 жыл бұрын
Precalc. midterm tomorrow in my college course...hope this helps!
@profrobbob
@profrobbob 9 жыл бұрын
+Bri De Leon hope you pass that midterm like BAM!!! Thanks for choosing my channel to study with and sub to!
@brianahideleon6698
@brianahideleon6698 9 жыл бұрын
+ProfRobBob Thank you for the motivation!! Now to await for the scores...
@profrobbob
@profrobbob 9 жыл бұрын
+Bri De Leon you're very welcome...thanks for putting in the time to study and choosing my channel to help you and I'm looking forward to hearing about that "A"!!!
@brianahideleon6698
@brianahideleon6698 9 жыл бұрын
I got my results back!!! I got a B and the professor said that that was harder then the 1st midterm.
@profrobbob
@profrobbob 9 жыл бұрын
+Bri De Leon thanks for sharing, CONGRATS...I hope your happy with that B because it sounds like you are on the right path to that "A"...BAM!!!
@jasonsocofieldlon1930
@jasonsocofieldlon1930 9 жыл бұрын
Hi Prof Rob,I love your videos and I have learned a great deal in the last 6 months since I found your channel. My question is about the first word problem involving the price increase. Would we want to restrict the domain to only x values above 50? It seems that it would make sense in the context of this problem to consider values above 50. Or maybe the x-axis represents the increase in price and not the actual price?? I would like your input on this when you have a chance.
@jaimealquicira5297
@jaimealquicira5297 3 жыл бұрын
Hi, great videos about mathematical modeling or modeling with functions. I would like to learn as much as possible how to solve this kind of problems. Right now I am working with algebra. They don't explain what you explain in this 3 videos. Any suggestion about what to do? What to read? How to develop this skill? Thank you
@WilliamJCrocker
@WilliamJCrocker 13 жыл бұрын
Could you please do one or two of the harder "practice plus" questions once in awhile? Tx BC
@carolinaman5026
@carolinaman5026 6 жыл бұрын
From my understanding (for the first example), if you wanted to find the price of the items which would maximize profit then you could find the derivative of that equation (4750x-5x^2) where R'(x) = 0. This will allow you to find the local max value since the critical points can be found where the derivative (or slope) of an equation is equal to zero. Therefore, you could find that your price which would maximize profit is x = 475. However, I am not certain that this is correct since I have just started learning calculus.
@profrobbob
@profrobbob 6 жыл бұрын
You are partially correct. Critical values are found where the first derivative is equal to zero or undefined. A relative maxima is found where the first derivative changes from positive to negative, not where the derivative is equal to zero or undefined. You must validate your conclusion by looking for the sign change. I like that you are working so hard on your studies:):):) Here are my Calculus KZbin lessons organized by chapter and topic, www.profrobbob.com/calculus
@carolinaman5026
@carolinaman5026 6 жыл бұрын
ProfRobBob thanks for responding. I think I understand what you mean. So first you find the critical value of x where there could be either a local maximum or minimum and then you take the second derivative of the function to determine whether it's concave downwards (max) or concave upwards (min). Thanks once again.
@profrobbob
@profrobbob 6 жыл бұрын
Caleb Brunson My response was discussing the First Derivative Test, and you are now talking about the Second Derivative Test😁
@gallo3286
@gallo3286 6 жыл бұрын
(50+x)(4500-5x) is wrong ?
@mahmoudabdalmaksoud8416
@mahmoudabdalmaksoud8416 3 жыл бұрын
Thanks,great content we all need
@profrobbob
@profrobbob 3 жыл бұрын
You're welcome and thanks for watching and learning...don't forget to like, subscribe and share this channel and it's content with everyone...especially your teacher so ALL current and future students know where to find free help...BAM!!!
@edwingarcia-hernandez3728
@edwingarcia-hernandez3728 3 жыл бұрын
thanks man!!
@profrobbob
@profrobbob 3 жыл бұрын
THANK YOU for watching and learning! Don't forget to sub and share!!!
@georginacampbell8469
@georginacampbell8469 8 жыл бұрын
My daughter is in need of help, are you available to solve 2 pre-calculus questions?
@profrobbob
@profrobbob 8 жыл бұрын
I am very sorry but I do not have any extra time to do private tutoring between teaching full time and KZbin:( I wish I could be more helpful.
@georginacampbell8469
@georginacampbell8469 8 жыл бұрын
No problem. Thank you! She will be watching your videos this summer :-) thank you for sharing your knowledge.
@profrobbob
@profrobbob 8 жыл бұрын
and THANKS for taking an interest in your daughters future!
@FoxbyPlays
@FoxbyPlays 6 жыл бұрын
0:06 Hey Vsauce, Michael here
@lavier610
@lavier610 2 жыл бұрын
Impressive entrance😃
@profrobbob
@profrobbob 2 жыл бұрын
BAM!!! Keep watching ...theres lots more where that came from:)
@InDstructR
@InDstructR 5 жыл бұрын
Anyone else going over this for the IMMC?
@Awesomegotham
@Awesomegotham 12 жыл бұрын
Thanks your a life saver
@profrobbob
@profrobbob 13 жыл бұрын
@essential82010 Thanks:)
@CoreyChambersLA
@CoreyChambersLA 3 жыл бұрын
Please get your mic closer.
@profrobbob
@profrobbob 3 жыл бұрын
This was one of my early videos when I was just using my camera mic. I promise they got better over the last 10 years:)
@profrobbob
@profrobbob 12 жыл бұрын
You are welcome...feel free to watch my channel whenever you get that "sinking" feeling...hahahaha:)
@2xmaximus
@2xmaximus 9 жыл бұрын
Where is the homework you talk about at the end of every video?
@profrobbob
@profrobbob 9 жыл бұрын
ankit mongia the homework that comes from your teacher :)
@WilliamJCrocker
@WilliamJCrocker 13 жыл бұрын
Thank you. C
@Erin-bc8ic
@Erin-bc8ic 9 жыл бұрын
I swear its so weird when you don't jump in like you usually do in most of your videos.
@profrobbob
@profrobbob 9 жыл бұрын
+Eric M the ones where I don't jump are my early videos, before I felt comfortable and realized I would be making more videos than I originally thought:)
@clemenciomitchangelyn8053
@clemenciomitchangelyn8053 4 жыл бұрын
okey
@Smokey_Crow
@Smokey_Crow 2 жыл бұрын
so fun!
@profrobbob
@profrobbob 2 жыл бұрын
Please share the FUN and this channel with everyone right after you subscribe...BAM!!!
@DynamicRoulett
@DynamicRoulett 10 жыл бұрын
"bayum"
@kifter4254
@kifter4254 6 жыл бұрын
Wish teachers did work on these boards instead of this smart boards..
@profrobbob
@profrobbob 6 жыл бұрын
Me too!!! I love my chalkboards...I've changed rooms at least 3 times since my school has switched to whiteboards and they have graciously moved them from room to room:) They are much more cost effective the all those markers they have to buy and there is no added plastic to the landfill from the empty markers...BAM!!! Thanks for watching...please sub and share this channel with everyone:D
@ohitsnickkk9785
@ohitsnickkk9785 8 жыл бұрын
Could u shotme out plz nice teaching i needed all the help i could get
@avocadolover4760
@avocadolover4760 3 жыл бұрын
I give up... im way too dumb.....
@profrobbob
@profrobbob 3 жыл бұрын
NEVER give up...if it's not me keep searching till you find someone who helps you...BAM!!!
@danitzasaucedo1714
@danitzasaucedo1714 5 жыл бұрын
i didn’t understand nothing 😭😭
@scillapriscilla
@scillapriscilla 10 жыл бұрын
your face looks a little bit like elvis :O
@profrobbob
@profrobbob 10 жыл бұрын
Haven't heard that before scillapriscilla ...if it was young elvis I'll consider that a compliment :0
@scillapriscilla
@scillapriscilla 10 жыл бұрын
ProfRobBob yes it was! lol but the most important thing is that you're great in explaining, so thanks for your video! :)
@profrobbob
@profrobbob 10 жыл бұрын
Whoo... scillapriscilla you're welcome and thanks for choosing #ProfRobBob to watch and learn from...please like, SUBSCRIBE and share my channel to support and help me groW!
@ricareecs
@ricareecs 5 жыл бұрын
Wtf bobo ko talaga
@yoantirce6638
@yoantirce6638 8 жыл бұрын
you make this much more confusing than it actually is
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