Explicit and recursive definitions of sequences | Precalculus | Khan Academy

[@Jaguar404x]

I just spent two days in class trying to learn recursive sequences and I didn't understand it but somehow this guy on the internet taught me it in less than 10 minutes. HOW. IS. HE. THIS. GOOD. AT. TEACHING.

[@shayaan7584]

HE. USES. BLACK. MAGICCCCCCCC!!!!!

[@shayaan7584]

JK

[@tannerq8900]

Cause now your paying attention.

[@Cgg222]

He is Saul Goodman

[@-clipz-]

Prayers turn to God may everyone everywhere be blessed and healed and protected in Jesus name amen

[@bobchlarson788]

Shoutout to all the other people failing math who came here to try to get help and got more confused

[@cubeheads4everxtreme638]

same and thanks for the shoutout

[@at-xh1yv]

i came here since my teacher is too lazy to teach & tells us to come here :-)

[@dontplay2912]

Bob Chlarson I’m not failing xd😂. Just needed clarification bc I’m taking algebra in 7th grade.

[@bethegreatest4976]

SOCCER IS LIFE

[@ethanisnothere1375]

Lol that means me

[@chocolatetwixbarnow4983]

Wait, this is precalculus? I'm learning this in Algebra I. Wtf.

[@salmah725]

Chocolate & Twix Bar Now precalc is the same as algb 1 Lmfaoo

[@marlyl1957]

you mustve been in an honors class lol

[@olamidefagbewesa870]

Same

[@quintonreese5880]

SAME i have this is algebra 1 honors btw im a freshman

[@ramelango3882]

I take this for algebra 1 too lol I’m in an honors class as well I’m in 8th grade

[@yougotnoyams7325]

And then satan said: " put the alphabet in math!"

[@at-xh1yv]

i love your profile photo rapmon

[@iwant8907]

I thought that was Yoongi

[@jamsforsale6767]

@@iwant8907 Then who is it?

[@janicegrailmer912]

this made me laugh so hard

[@Sintrell1381]

Wow😭😭

[@THESOGGYSPONGE]

My brain just imploded

[@holylarcenist9596]

at least it didn't EXplode

[@edh2688]

+Crispy Bear Boooo lol

[@holylarcenist9596]

+Ed H I try

[@imagination7710]

Did you tell the doctor? Im sure he has a pill for that

[@THESOGGYSPONGE]

He did

[@user-sx1up5oh2d]

Thank you this really helps, I am currently taking a math class right now and the teacher doesn’t even take notes and he is very uncommunicative, so it is hard to figure out how to do the math, but everyone else in the class gets it

[@firebthegod4669]

wait arent u supposed to take notes not the teacher?..

[@Everito_TheBurrito]

I think you might have my teacher

[@TheBancho22]

"You can find every other term in terms of the term before it." :D nice

[@ranic993]

I am now more confused

[@JuicedUpGolf]

i agree

[@deaduserrr6348]

Dan Talks you are VERY wrong

[@bethegreatest4976]

SAME!!! 2019!

[@user-zf8gy1yw1p]

stfu noob

[@mavericklucas594]

Thanks, I was struggling to understand this on my homework and this helped a lot.

[@RIMPND]

5:28 The most racist quote on khan academy...

[@pyramixmaster7905]

Why so NOOB!? lol

[@joec4505]

LMAO

[@thetientran]

Why so NOOB!? F

[@daltonbrown5482]

LMAOO brown is not an attractive color

[@bargouise]

Rip

[@elliptix9344]

OMG now I understand THANK YOU SO MUCH I emailed my teacher so THANK YOU I DON'T NEED HER HELP ANYMORE :)))))

[@joylox]

You need to do a video on solving these, and/or a discrete math series! It gets a bit confusing to solve. My last assignment was proving the Fibonacci sequence, which is cool, but a little challenging.

[@gabrielgazeti5883]

2+2 is 4 -1 thats 3 quick maths

[@ditrixgenesis781]

Quick mafs

[@cookiesandrainbows3322]

Everyday man is on the block

[@jamsforsale6767]

Smoke trees

[@josephrankin3843]

see your girl in the park

[@sonofjesus1464]

I found how to do this. Lol God bless :D

[@charmingcurls7401]

Thank you so much! Helped me so much!!

[@ditrixgenesis781]

I'm here for my Math 232 class, but that last little statement applies to more than just math (for myself, Comp Sci 250). Explicit code is very direct, but will take forever (hyperbolically) if the correct problem comes up, so the solution is to use a recursive code with a beginning term. Cool

[@tannerq8900]

Thanks, my teach went over this in 20 minutes, that may seem like a good amount of time, but do that, with only 3 problems, and him not fully explaining how it is done, or what explicit, and recursive equations are! (Don't get me wrong he's a great math teacher, but he needs to explain a few things more. Instead if hinting at what something is.)

[@ashleyb7887]

this man saves my life every time

[@at-xh1yv]

i came here since my teacher is too lazy to teach & tells us to come here :-) no one? ok

[@derrickseo503]

hello lol

[@lovi9258]

samee

[@SequinBrain]

This increasingly disgusting, bad habit teachers have wasn't a thing in the 70s or 80s, since the iNet was in its infant stages. I'm trying to get more oversight on bad teachers and how to remove them, but evidently, this process is also in its infant stages or doesn't exist at all.

[@specter1001]

This is a supremely helpful video. thank you!

[@trippinthecreator3148]

I don't know if it will help anyone, but learned it as F(n) and not A(k). Should't make a difference, but it's a bit confusing at first.

[@xiomara8610]

Thank you, i was genuinely very confused on where A(k) came in my homework.

[@parkjena1923]

thank you! you just answered what i was looking for :D

[@jessicaledwick899]

Thank you! It was quite a search to find a youtube video that tells the difference between recursive and explicit.

[@aesthetic_animes9331]

Thank you so much! This really helped! The way we do it we substituted k to n so it kinda confused me a little but now I got it!

[@rachelpark3295]

You make this so easy Thank you!

[@theblackk-night3334]

I started my test yesterday and I'm now watching this before school the next day so I can pass it

[@Seth-pf4bo]

I thank you for getting me through middle school

[@SaraphL]

Link to respective playlist on khanacademy website, please!

[@victort.4798]

POV: it’s 5am on a Sunday during covid virtual school and you’re cramming for a cumulative precalc exam due at the end of the day :)

[@mastergamer4928]

Precalc exam? I'm doing this in algebra 1

[@pbates1693]

Anyone here cause school got shut down

[@edgarperez8949]

thanks for this explanation! the textbook I'm reading was not clear on the recursive definition!

[@iamnottweezy]

i got a 47% on my test so now Imma retake it and actually study

[@gracenoel373]

He makes this sound way too complicated.

[@ZeqiG]

Have been doing this topic at college. We call them deductive and inductive definitions though rather than explicit and recursive :)

[@thomaslandrey5691]

This video is algebra 1 not precac so that's why you guys are confused. Its off topic

[@basedandbananapilled2677]

Advanced Algebra, is when the formulas are learned

[@elliptix9344]

I'm in pre algebra and we are learning this and I understand it now

[@SequinBrain]

It actually is precalc since it comes up again in Cal 2.

[@fatguy7923]

yeah i’m in algebra 1 rn

[@CaMaa456]

this did not help

[@sandwich8240]

Me, when I have a quiz on this tomorrow and still don't know absolutely anything

[@alexy.9306]

Feels good to know 900k + come here to study with me :)

[@keela7324]

Can you help me w/ this? My question is find the explicit formula of 4,8,12,16,20

[@pbates1693]

OwU no

[@nbshftr]

1:07 downhill from here

[@yateeth10]

This is gonna help me on my test Tomorrow because I don’t pay attention in class

[@dontplay2912]

U saved my life

[@jenlin6913]

Thank you so much!

[@barry2855]

love this guy

[@anilafariab]

Do you guys have any tips for raising your math grade?

[@elliptix9344]

Not really my grade rn is a 75 barley passing so just do your homework and sit next to the teacher in class like I do so you can be sure to hear what they say

[@citrusgem]

khan academy my beloved

[@Sintrell1381]

Can anyone tell how is this finna keep me living or help in life

[@parkjena1923]

no, no one can cause it cant 😭

[@shams...2417]

Thanks 😊

[@tanyonderrick168]

I understand how to do recursive just fine. and this was very different. I just wanted to know how to make an explicit function

[@aalokhardikar8342]

Thank you

[@RONOVLOGZ]

Very helpful thank uou

[@tar0286]

well i understood.

[@dirtydozenzclash7333]

I understand recursive quite well and I must say that this made no fucking sense.

[@jamiejamie9262]

Im saying !!

[@vlogsbyrow]

Well then you didn't understand it well enough.

[@FallingDrop234]

I swear to god I’m just gonna get a bunch of math books one summer and study up to precalc so I never have to deal with this again

[@MehkaiManzano]

omg thank you so much, I understand

[@elliptix9344]

Okay. What I learned was An=An-1+d but the 1 is tiny it's the size of the n

[@rayankhan3858]

Same

[@geraldaynyabyabin4289]

(k-1) what is the use of -1?

[@galacticpopcorn9981]

5:43 AERITH

[@ericawu8779]

"This is not an attractive color" lmao 😂

[@Trippie-cn8ot]

YESS, we love just still not getting it

[@danielmcdonald3642]

thank you!

[@AngeRKang]

failing math during quarantine squad?

[@firebthegod4669]

biig yeeees

[@hoodiefreak9206]

I have a test on this today. We’ve been learning this since Monday and I still don’t understand

[@iwant8907]

I hate math but I love his videos

[@kazuohiroshi3923]

thx man

[@hannahellkitty]

What if you don't have your first term or difference but you have the number of terms?

[@95MarioKaci95]

What book are u using??? can someone tell me?

[@josephmurillo3689]

This made it harder and made me confused

[@kyrajohnson3029]

Ok so I like how you worked but we're learning recursive a little bit differently. I'm totally lost with the recursive equation and I think I get your way but trying to turn your way into ours is giving me some difficulties.

[@sonofjesus1464]

or ours into his way. He needs to work it the normal way :(

[@sonofjesus1464]

+rusko dudesko And I major in Tardiness

[@shosnow6824]

+Son Of Jesus Mom

[@victorstorm2880]

so you shows ak-1, but what if the formula says ak+1, what does that mean? the next term? if its recursive how can u being going off of the next term?

[@00777_]

I have a math test today and I failed the practice test. Please help Edit: I failed 🧍‍♀️

[@nomsai5663]

LMAO

[@HereForTheComments]

What happens now? Is there still hope for your mathematics journey?

[@00777_]

@@HereForTheComments school’s out 😎

[@HereForTheComments]

@@00777_ Did you pass the grade?

[@00777_]

@@HereForTheComments yep I did well on all the other test this one just messed me

[@user-ip9fp8ug5y]

Question: is there always a -1 in the (k-1) part or what?

[@ChrisS-rp7yo]

I only in seventh grade doing this

[@RagtagNinja]

sounds like younger by your English

[@lemonsqueeZ96]

RagtagNinjaboy Not everyone on the internet speaks English their first language.

[@calistakibak2287]

Chris S Me too!!!

[@Sabrinageerman]

wtf thats horrible i am so sorry

[@elitetech7728]

hi_frwend i laughed so hard when i read this

[@MarySilva-id1xe]

Ok so the explicit for me looks like f(n)=-6+5n and recursive was an=an-1+5 soooooo I'm hecka confused here and I have math first hour and I've been studying all weekend. And I was supposed to be celebrating my late bday today and ended up studying for my 5 FINALS TOMORROW....love that

[@yuan3023]

Bruh i slept on my online class in math and i have a test later and watching this now

[@AntagonistAndy]

That's crazy who here cause of corona?

[@daniellelaraze7135]

Thank you. I understand it now. But I have a question. I can't get the recursive formula of 5, -10, 15, -20, 25. I have tried this several times to get this formula. Can you help me?

[@daniellelaraze7135]

No, its alright :) I already know it :)

[@erichuang5971]

{asub1=5 {asubn=asubn-1-5

[@saiharinathnerella501]

Your so dumb that's easy

[@doveu]

@@saiharinathnerella501 you're*

[@dontplay2912]

-2(n-1)

[@g-romeroflaviankaromero6335]

Can you make a video on how to be good at math because my brain just don't agree with Math because its hard tnx.

[@seagull8758]

Put it in double playback speed and you can learn everything about math in like 2 days

[@TheMacbebe101]

Lol what?

[@uyenchang9062]

what is it mean "one less than the term we add"..?

[@ellieb8627]

To find the mean you add all the terms together and then divide by the number of terms

[@poptarts1455]

Is previous term always -1???

[@nomsai5663]

The way there’s 1M views but only 2K likes, just shows how many times ppl had to re-watch it 😭

[@imagination7710]

Could I not say for the second one; 3k + (k-1)?

[@euniceruta3260]

I kinda understand it but how to get the next term when the differences are not the same?

[@GraceandBeth]

haha i’m a year late but if they’re not the same then it’s not a arithmetic formula

[@543vantankhang5]

My mind is explode right now , but it's okay . I'll rewatch until i understand it .

[@colinwhitlock5148]

Why isn't there a single video on KZbin of someone doing a quadratic version of this?

[@akshayappan6526]

Why does he put a (k-1) after the three? Please answer.

[@sonofjesus1464]

+rusko dudesko no. Just no

[@Dattaya108]

/math/trigonometry/seq_induction

[@doretheadillings8007]

Wha .. ? WHAAA ??

[@anthonymarlow2269]

You have a high IQ

[@diana-wu8cc]

i’m still kinda confused. why are we minus-ning 1?

[@kennedysaniah]

He sounds like Young Don the sauce God

[@gumbosunrise1825]

Ay thanks for the help but pretty sure i still bombed the test

[@silviabronder3337]

why cant I get this?

[@wizard-cs2st]

5:26 *brown* khan: "that's not an attractive color, let me write this in.." *WHITE*

[@PlayaRiptide]

I don't think he meant it like how you think he meant it

[@jhunepaullawagon5152]

Sir my given is this F(n)=8m-5 can you solve this

[@notMysticz]

shout out for the 8th graders at BASIS wallowing in regret

[@malloryscinematography7021]

I gotta test Tommarow and I’m not consuming any of this information

[@numba1depecher]

had to turn in a test today with literally nothinf kn the first page cus i cant do thus yet 😭

[@anthonysanchez8669]

His voice though

[@somewhiteguy1945]

hold up, this is pre-calucus?? Im learning this is algebra...

[@hellol2012]

Same :/