Find the first several terms of a sequence with given two terms

[@ebickachow9078]

This man explained more in 4 minutes than my teacher did in two weeks

[@benjaminfroese3465]

facts why are is my teacher so bad at explaining math

[@moshimoshi9081]

lmao HAHAHAHAHAH

[@zasunoyz6598]

Lmaoo

[@omegadragon432]

Because Brian doesn't have dumb students.

[@harrykt5442]

@@omegadragon432 nailed it

[@norskii4893]

Easiest thing to do is just take 42-26 and get 16. Then you do the a12-a8 which is a4. 16/4 = 4. Therefore d = 4 and then you just plug the d in for the equation to find the a1 or whatever you need. This works for every single equation about finding the d.

[@andreluquin7006]

Thanks bro!

[@ivylalka6140]

It doesn’t work with mine

[@ivylalka6140]

A1= 145. A5= 113 145-113= 32 5-1=4 32/4= 8 The answer is supposed to be 5

[@danieloppenheimer6243]

@@ivylalka6140 I think that your problem didn't work for phantoms way of solving it because you were given the wrong answer. Because if you multiply 4 by 5 because A1 to A5 is 5 spots and you are supposed to subtract 1 so 4 times 5 ,which is the answer you said you were given, you get 20. And that doesn't make sense because 145-20=125 not 113 also by subtracting 5 from 145 you can never get 113, no matter how many times you subtract it. In conclusion, you were given the wrong solution. Ps: I am only writing this to study for a test I have, and this is practice for me

[@lmjohnston9596]

Wow your comment made it so much easier. Thanks I couldn't understand the video. 😅

[@brianmclogan]

thanks!

[@liacaia1621]

Is there a formula to get the 'a sub 1' without having to minus it all backwards? I have a problem and the "d" is already given, but there is no first term.. I'm a grade 10 junior highschool student

[@Eli-oi4ug]

@@liacaia1621 thats the only way lolol

[@liacaia1621]

@@Eli-oi4ug Huhu Thank You!

[@ashleysnow7338]

Why do I learn more from this guy than at my school?

[@vdeaddd]

bro i had the hardest time trying to figure this out. My tutor did not know how to do this. In 4 minutes this guy made me completely grasp and learn the concept. I don't usually write comments but shit this guy deserves one.

[@sparklingsummer8733]

Omg this video is 7 years ago but still helps us. Thank you so much❤️😭

[@spongebobbutindian9255]

This vid just made finding the common difference so easy! It is much simpler to understand than what my math teacher is saying. Thanks a lot!!

[@maxisfine1367]

This whole time I thought I was just too dumb for precal, turns out it was just the way my teacher was explaining it, thanks man it helped me a lot. :)

[@nayumi_eloiza1242]

i'll just say. He is the very first person i look up when i need help. thank you for your short meaningful and understandable videos Sir!

[@Louisabeastfr]

Your lessons help me so much and make math easier for me. Thank you so so much.

[@xr1383]

😤👏👏Explained this better than my math teacher

[@manal1699996]

this extremely helpful, you saved my life! thank you..

[@brianmclogan]

+zoz ahmed you are very welcome! happy to help

[@jhosmeilyhernandez3131]

been watching you for the longest!! it only took u 1:45sec to answer my question. Thank you!!!!

[@adidasthottie]

i love this guy. thank you so much, Mr. McLogan.

[@TheImportCars]

What a great teacher!

[@brianmclogan]

thanks I appreciate it!

[@cesarpalomares3630]

Thank you so much!! Your honestly the best teacher. My teacher just straight up gives us the formula and makes us figure out the problem by ourselves. Thank you so much 🙏🙏 you saved me from flunking my algebra exam 🙏

[@adamhegazi5706]

you actually helped me understand when everybody couldn't, thank you!!!!

[@brianmclogan]

you are very welcome! happy to be able to help you out!

[@reyn_arts7641]

This really saved my day because our teacher doesn't explain this well and this teacher just made me understand just in 5 minutes. Thank you and I subscribed to your channel.

[@HadiAsh]

LITERALLY ASKED MY TEACHER THIS AND GAVE ME A 20 min explanation that I still didn’t understand NOW I JUSE WATCHER THIS 4 minute video now I know🤦🏼‍♂️

[@unidodie2366]

This video can save lives better than doctors.

[@kylemthayer]

I can always count on you Brian to teach me something that's on my homework but not in the notes. you would think my teacher that actually gets paid to teach me would actually have a problem or even a formula in the notes but nah that's too much work.

[@MichaelFord147611]

Thanks for the help. Couldn't find this anywhere else on KZbin.

[@brianmclogan]

happy to help you out

[@marckennethdelacruz6758]

Thankyou

[@aidanwilkiewicz7109]

This helped so much thanks

[@german9167]

gracias profe, hiciste lo que tres meses de clase no hicieron

[@kal.amansi1825]

I love this guy so much omg

[@natalievierneza9359]

He discuss very well within 4mins He's Great thank you for helping us❤️

[@misspigglet]

This has helped me alot. Thanks Teacher💥😊

[@brianmclogan]

You are very welcome

[@aadyshrestha7756]

Thank u 🙏 lord! For this video just saved my math grade.

[@hashimoto_7982]

Thanks you so much 🙏

[@nevergonnagiveyouup7267]

Wow this guy explained it better than the ones in my language

[@chya4741]

Thank you sir!!!!!💖

[@MrFarai489]

Thank you So Much🙏🏽🙏🏽🙏🏽

[@Kafyyyx]

thank you so much u saved my exam

[@imperialprime7991]

dude you saved my life thanks!

[@angelablase3136]

BEST MATH TEACHER EVER MWUUAHHH!

[@ryvncrz]

Ginagawamue

[@jessicamoreno8815]

thank you so much

[@ahliaflower7551]

Thank you so much ☺❤ I realllly needed it at all.. very useful ❤❤❤❤❤✌✔

[@jarlsaerhonugnay8847]

Thank you so much!

[@qamarz125]

Great tutorial

[@karlmartinrosete8597]

Thanks for this video sir, its really helpful bcuz I don't want to do it and tomorrow will be my exam so thank you very much.

[@tntvhd2424]

You absolute legend saved my GCSE’s

[@sumayahaidari8982]

Your a genius

[@itshasim_21]

Why do we need to know this in our lives? 🙄

[@Lennyst]

Well you will need this if we have kids and you might need to help them when they get the same homework with useless information that we did as a kid. But other then that I can't think of another reason.

[@et3rnal163]

@@Lennyst LMAOOOOOOO

[@johnnymoto4277]

Reading this comment while making my assignment

[@lemondrop8203]

Many engineer careers need this type of math in their job. Same as many other jobs

[@boom350ph]

Thank u good sir I forgot how to do this and I wish this was this easy to understand

[@unknown-zc1cf]

THANK U SO MUCH

[@xoxo_ang]

before replacing n with 4, I understand that you did 5-1. But from 8 - 12, isn't that 4? so shouldn't it be 4-1=3? or are you including the 8 when counting? Any help would be greatly appreciated. Thank you!

[@milena3051]

Yea I’m also confused about that?

[@carsonlecky1254]

You are the best

[@migs6674]

Thank you!!!

[@theejaytagama2357]

Thank you bro

[@taylorkif]

this really helps thank youuu

[@jocelyne_014]

wow thank u for posting this vid 10 years ago my teacher taught this today and i was not listening so u a real one for that 😎🤯🤯😵

[@loicst-denis4201]

great content thanks!!

[@dykpop5493]

Waaw!! I just finish my homework!

[@user-qx8je5hz2m]

THANK YOU SIRR

[@BLue-wr4mb]

Thank you so much. This SAVE me ♥

[@brianmclogan]

you are very welcome!

[@fayer6700]

Mind blown🤯🤯🤯🤯

[@ishveersingh6562]

I would die to get him to be my teacher

[@yeetmcyeehaw2239]

I was on the verge of exploding, because my Math module didn't explain how to solve for stuff like this, THANK YOU

[@edadederson6516]

what if the given is a894 and a1009? how do i find a1 without having a manual subtracting?

[@Godakuri]

That's what I need to know also. Do you have a way?

[@princessrubyaniceto943]

i do have a way

[@Godakuri]

How do I find a of 1 extremely fast, I'm taking the act and I dont have time to subtract (d) from every single term

[@asherrobinson5586]

I just subbed in the numbers into the formula so d=4 and then I used the 8th term so An=26 and n=8 and just completed the equation. Idk if that helps I am bad at explaining. P.S I know this is pretty late but thought I’d chime in

[@asharibimran5645]

why n is 5, plz explain it? time 2:40

[@brianmclogan]

42-26= 16, they are 4 terms apart so 16/4 is 4.

[@asharibimran5645]

thsnk you so much

[@Adriana-no4iy]

Will this work for a geometric sequence as well?

[@brianmclogan]

yes but you have to use the formula for a geometric sequence

[@georgesalibongcogon815]

how did he get 4d pls answer

[@grandkid808]

How did you find n I don't understand

[@0uo258]

Awesome i just perfected my spelling bee thank u sir love u :)

[@0uo258]

Sorry for the joke but u really helped me at my exams sir

[@brianmclogan]

haha, you are very welcome! happy to be able to help you out!

[@ammanuelh3413]

But who is Kurt

[@mikomikoo3307]

I wanna know how to fins the a1 if the S is given

[@mercyvalentine8151]

im still confused on why n is 5

[@kudasai2371]

Yeaah

[@einaflores900]

If you count from 8 to 12 which is the given in A it should be 5 but then n-1 so it will be 4

[@kudasai2371]

@@einaflores900 thx❣️

[@HAMclint]

Thank youuuuu @EinaFlores

[@JORENSKI]

@@einaflores900 omg thank you

[@Julie-dj9dt]

Salamat po

[@patrictinashe5674]

Hi there sir. Is is possible to work out 3 terms of arithmetic sequence given only 1 term and the sum of the first 12 terms.

[@natalievillalobos941]

sorry to interrupt the class but may I use the restroom ?

[@johnmichaelgalapin4849]

How did he get 5 as n again?

[@AkoayNigga]

@@johnmichaelgalapin4849 That keeps me wondering too

[@AkoayNigga]

He said he count from 8-12

[@dbg_darker5177]

truth

[@fatimahassan7367]

why is n five??

[@hasnaynraza2030]

THANK UUUUUUUU

[@estellevidal1415]

But what if you are only provided with 1 term, what do you do then?

[@masterno8576]

Thank you so much i knew there was another easier way to solve this what a stupid method we have in the book

[@brianmclogan]

Happy to help

[@yuae5078]

Why would the n be 5? Sorry for the late comment im just having a pretty hard time trying to understand this

[@vanellopevonschweetz6099]

8, 9, 10, 11, 12

[@simonho413]

My teacher taught me the geometric sequence version of this.

[@Qwami-cq1zr]

if u_n=23 and U_2n=13 and U_6 = 9 of AP find a and d

[@user-lk9it7kr3e]

How did you know n is 5???

[@mbalithomo3980]

You ate this

[@kudasai2371]

How do you get the 5

[@Itz3n0ch]

Do you how to to find a1,d, and an using two terms?

[@k1ko.]

why did you pick 5 in the n???

[@donpatrisyo5624]

Why is N = 5?

[@itsdarilynf2318]

can i ask question? can you please explain to me this one (8th term is 75 ; 20th term is 29)

[@itsdarilynf2318]

what is the common difference and the a1?

[@M10rtega]

@@itsdarilynf2318 common difference is -23/6 lol and a1 would be 611/6

[@nischithbr8562]

Sir how did you write that n= 5

[@johnmichaeldelacruz2632]

Can i ask? what if you have a6=10 and a21=55 what is nth term ?

[@brianmclogan]

Same process

[@bronxnosenshi]

good video but zac better pay attention next time

[@lulu-tl1wv]

Where dide get the 16?

[@migs6674]

Transposed 26 to the other side of the equal sign

[@marasigancharlesjuveng.7870]

how to get the d if the given is sn, n and a1

[@ABMMonzalesGraceAnne]

Where does 5 came from? I mean the n ???

[@maseawakev.1119]

I don’t understand how to find (. A 1 .) without re-subtracting.

[@maseawakev.1119]

Would’nt it be wrong?

[@SuKoOn_GuY26]

How you get 4 there

[@robbiemcmasters1514]

arithmetic sequences are just linear equations. Just treat it like two coordinate points. Find the slope and use y=mx+b. Its nothing more than a linear equation.

[@alyabatrisyia3468]

I'm facing difficult question now. if sum of the first seven term is given and 4th term is double the 2th term. Find the common difference and first term

[@chumontesclaros891]

How did he subtract 26 instantly? My guess is he is transposing 26 but idk Im dumb af. Pls help 😵😰

[@ericaywho]

i guess 42 - 26 = 16

[@JuanChavez-yk4uc]

Will this work for geometric sequence?

[@brianmclogan]

+Juan Chavez yes

[@Phantysm]

How do I find the arithmetic mean beetween my a3 and a5 it is so hard