Learn how to find the partial sum of a arithmetic series

👉 Learn how to find the partial sum of an arithmetic series. A series is the sum of the terms of a sequence. An arithmetic series is the sum of the terms of an arithmetic sequence. The formula for the sum of n terms of an arithmetic sequence is given by Sn = n/2 [2a + (n - 1)d], where a is the first term, n is the term number and d is the common difference. Where the last term is known, we can use Sn = n/2 (a + l) where l is the last term.

Organized Videos:
✅Series
✅Series | Learn About
✅Find the Sum of the Arithmetic Series
✅Find the Sum of the Geometric Series
✅Write the Rule of the Geometric Series
✅Find the Sum of a Series
✅Write the Rule of the Series

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[seanthebarber]

This just helped me finish my last ever high school math test, thanks!

[ximenapaz]

I was really confused with partial sums prior to watching this. Thank you for making it so easy to understand!

[ogsupremelyvida]

I have to take a semester of precalc in less than 2 weeks, and EACH of your videos explain what to do in the best and FASTEST way possible. THANK YOUU!!!

[shanainemosende]

While finding the A sub n, another way is just substituting the a sub n with 10 and still get the same number which is 13. Without going through the whole process of a sub n is equal to -3n + 43. It just seemed easier this way but still a great vid.

[juliabernal]

Everyones talking about the easier way but i like ur way better thank u so much u rock

[mohrukhtalabkhoja]

Thank you so much. This explanation helped me a lot.

[kylemartin]

When you write 40 + (n-1) - 3 it looks like you are subtracting 3. Use parentheses, that's what they are there for.

[adrid]

Can you help me with the partial sum of (1)/((4n-3)(4n+1)) im losttt.
Looking the patrón I know is n/4n+1 but I cant know how get it with steps.

Greetings from Uruguay

[cristine]

Find 5th term of the sequence if a15=29 and a27=47 paano ito?how?

[comeleontravelandtoursintl]

do you know there's an easier way?
example: 40, 37, 34, , 31...n=10
(just continue it)
like this: 40, 37, 34, 31, 28, 25, 22, 19, 16, 13
then add them all up and you'll end up with same answer:265

[plaisirdash]

ín the equation why couldn´t you say ( an= a1+( 10- 1)-3) ?

[lilychee]

This is very helpful, Sir. Thank you.

[beratymeri]

it's given progression arithmatic an if so three elements are known: a1= 10 d=4 an=50 n=? Sn =?

[EvulaniorePH]

I use dis formula "Sn=n(A1+A2) / 2" yet I got the answer of 385 O.o instead of 265... I thought even though I use a different formula I expect it to have the same output as yours, Unfortunately, I wasn't able to the find the same answer of yours...

[davemagtagad]

how did he get the -3 on the d - defference?