Finding the Sum of a Finite Arithmetic Series

[flubadoo]

THANK YOU SO MUCH

[ChrisN1995]

What if the question is like: 3+7+11... +455?

[devikastar1]

Because of you, I will not be failing my SAT IIs this weekend <3

[patrickJMT]

@devikastar1 good luck!! : )

[CaptainSamsquanch]

took my math teacher 25 mins to fail at teaching this. took you 10 mins to do it right, not to mention you come with a pause and rewind option. Pat> my school teachers

[patrickJMT]

@CaptainSamsquanch : )

[fifa08ronaldhino]

Hey Pat is it possible to find the sum to infinity of a diverging arithmetic series?

[patrickJMT]

@fifa08ronaldhino not that i am aware of : )

[SangsooHatesYou]

thank you so much! I had to double check before I take the finals today. I have it in about 6hours from now

[Extesd]

Thanks for the help, walking through the process helps to illustrate the fundamental ideas behind the function.

[AkinjisolaAkinkugbe]

If the other equation is used, i noticed that the n value would be 18 and not 28. Why is that?

[Truwarier14]

can you show how to find the sum of a finite geometric sequence?

[patrickJMT]

@Truwarier14 pretty sure i have a video on it

[PeterKang1284]

do u have any videos for infinite?

[patrickJMT]

@PeterKang1284 an infinite arithmetic series would not have a finite value.

[redpanda900]

do you have a video in which you use the other equation?

[singhinderjit95]

at 2:29 how you know which formula to choose, please help

[kylewg26]

just started a level maths and im feeling down because i'm not really struggling, especially with this question: A= -12 L= 40 and the Sn = 196, its says find number of terms and difference.

Thanks if you could help me at all i would appreciate it muchly i looked at answer but didnt have a clue how to get it

[placky123]

This is not a FINITE sequence... Finite means it has a last term..

[patrickJMT]

@placky123 wow, just wow....

[ry7ky]

@patrickJMT I wonder how he found your video lol.

[patrickJMT]

@ry7ky hahaha i sometimes wonder : )

[kweeran1213]

thx. the videos were good and i had enough time to watch family guy and pass my test lol

[mynameisneah]

hey guys.. does anyone know what is the solution for this.. i dont need the answer just the sloution

Find the sum of the series 91+85+79+73+. . . . . + (-29).

[flirtasiax3]

Thank you so much that was great!

[plutorox1]

thank you your videos are the only thing that are keeping me from failing please dont stop i nneeeeeeed these videos

[GodlyLouis]

how do you work out the formula?

[Jathwon]

I have a question, what if the question in -100 to 30? How would I solve that?

[gerotop]

what happens if say the question was :

find the sum of the numbers in the sequence between 10 to 100 (it's not terms and has no further info)

[MrCreelers]

Thank you so so much for this!

[acdcobsessedidiot]

Ok so i'm not really getting were the Divide by 2 comes in for your equations. When i did the sum(Srs() in my Ti83 I did get 155, but why would you put divide by two on your equations?

[Fabian67898]

im a junior in high school and my honors Math Analysis(pre-calc) final is tomorrow and your videos have helped me alot thanks!

[XxDJ2SiCKxX]

i really dont wanna retake this in college so im using ur videos to study for my precalculus final tomorrow lol......btw im a junior in high school so this is very helpfull

[MrTopperAZ]

<3 the beer the commercials 

[xTanGOkiLleRx]

did you divide by 2?

[acdcobsessedidiot]

@xTanGOkiLleRx Ya i noticed that too. I did the sequence in my Ti83 and he just missed a step. But yes divide by two.

[DE4MEE]

Thank you sir!

[Dewzy100]

this is gonna sound really sad but I learn more from your videos than I do in lectures or tutorials......:/

[dsmhhhx]

Could you do an example by finding the sum of a series, when the series is in summation notation form

[dsmhhhx]

Could i request a Video?

[dsmhhhx]

@dsmhhhx What if the N - Upper limit, was infinite?

[hannahfgh]

Aaaaah I think I love you! Hello A!

[weaknessisnotallowed]

Do you have a video explaining how to find the sum of a taylor series? The question is asking to find the sum of the series (2^(n+1)-1)(x^n) .

[Wolverines457]

And to add on to that it was one that you had to know some basic calculus information

[Wolverines457]

@patrickJMT they are so good, tht i just watched one about calculus you made and understood it, and im in acc. alg 2

[Wolverines457]

All your vids are good

[patrickJMT]

@Wolverines457 id like to think they are not all terrible : ) so thanks very much!

[sdouglas28]

patrick you are one crazy boss

[randombyday]

Thank you sir.

[fafase]

Would you by any chance have a video about Erlang B formula? Or if you know anything that explain it in context? thanks

[rosiinnaaa]

oh look 4 dumb children who cant understand this AMAZING lesson

[Cenabetimam]

I've been getting it wrong where you pointed out with question b..makes sense now...thanks so much!

[loverboi812]

OMG....I get it now 0_0.

[mariomaruf]

How do I go from some series of number to sigma notation? I'm pretty sure I've got it down but I just want to make sure.

[phazed009]

What is they dont give how many terms you need to find? My sequence is just: 5+7+9+...+75. I have to find the sum of this and I have no idea of how to do it.

Please help

[cytongtong]

the like the n(a1-an)/2 more

it's faster

[ForeverTrueLove49]

if you have a series that is "o-2-4-..." Do you do it in the same method?

[ice5nake]

Decent video. Audio quality could be a little better.

[mommasboy34]

my teacher doesnt help me for shit. thanks man.

[V1Narcissus]

thank you so much .. for your videos.. my teacher can't teach this is way better

[patrickJMT]

@V1Narcissus my pleasure

[mobaccho]

whats the difference between the two formulas?

[MistressKim]

Man I love you. I have a test in 4 hours and I'm studying my notes for this subject and my professor has me confused with this formula and the arithmetic formula. I already know how to do both but was confused about when and which problems to use them. lol

[hattrickster33]

Man I wish my teacher was this easy to understand....

[ELOM76]

you can substitute (n-1) for "c"

[HearTheBlue]

what if you have a problem and you don't know the number of terms?

[patrickJMT]

@HearTheBlue well, you would somehow have to be able to deduce the number of terms from the info given, otherwise i can not see how you would do it.

[HearTheBlue]

@patrickJMT Thanks I figured it out. and P.S. your videos have gotten me through algebra, just saying. :)

[vietboi914]

Why does math have to be so hard even if its the simplest LOOKING stuff? =/

[fleetbong]

great!!!

[epichariot]

Around the last part, I started to lose how to do it? If the nth term was 18, and the formula was n-1 how does 18-1=10?! If you did explain it, I apologize. I'm just not good at math. :(

[asolutionforyou]

@epichariot If you are not capable of realize this sum 1+2+3+4+5+6+7+8+9 .... 98+99

this video explain you how to do it.

More easy without algebraic expresion: For n=10 sum (9+1)+(8+2)+(7+3)+(6+4)+5=45 <==[cheat: 4*10+10/2 <==(n/2-1)*n+n/2 ]

45==1/2*(10*(10-1)) <=> 1/2*(n(n-1)) <-- this for teacher

[asolutionforyou]

@epichariot If you are not capable of realize this sum 1+2+3+4+5+6+7+8+9 .... 98+99

this video explain you how to do it.

More easy without algebraic expresion: For n=10 sum (9+1)+(8+2)+(7+3)+(6+4)+5=45 <==[cheat: 4*10+10/2 <==(n/2-1)*n+n/2 ]

45==1/2*(10*(10-1)) <=> 1/2*(n(n-1)) <-- this for teacher

[asolutionforyou]

@epichariot If you are not capable of realize this sum 1+2+3+4+5+6+7+8+9 .... 98+99

this video explain you how to do it.

More easy without algebraic expresion: For n=10 sum (9+1)+(8+2)+(7+3)+(6+4)+5=45 <==[cheat: 4*10+10/2 <==(n/2-1)*n+n/2 ]

45==1/2*(10*(10-1)) <=> 1/2*(n(n-1)) <-- this for teacher

[mikeymeb]

what if you arent given the nth term you are looking for.. instead you are given a number... for example

Find the sum of the arithmetic series..

17+27+37+...+417 ?

[oneshot1326]

@mikeymeb use Sn=n/2 [2a+(n-1)d]

d=10

a=17

n=number of terms

[oneshot1326]

@oneshot1326 haha my bad use

Sn=n/2(a1+an)

n = number of terms

a1=17

an= 417

[tusanotte19]

Thank you my book is horrible and has no explanations I guess we "should know how to do this?" haha thanks for the great video and great explanations

[1989Guardian]

I understand math in English more than i do in my own language:P

[yyykkll]

ME2

it's like an English thing

i learn in maths in mandarin(sort of chinese)

my teacher just goes on and on

even if i listen to him on lessons

i still cant have a full picture of what ive just been taught

[fldoughboy72]

Always great!!

[ap2012]

You're so smart! I <3 smart men!!!

Where can I buy one? lol =D

[timar03]

ebay duuuh -.-

[666joemetal]

@ap2012 Craigslist, They are used though.

[ap2012]

Haha!

=)

[ksly1111]

@ap2012 

[BOGZASV8MA]

cool video