Finding the sum of a series with alternating terms

👉 Learn how to find the geometric sum of a series. A series is the sum of the terms of a sequence. A geometric series is the sum of the terms of a geometric sequence. The formula for the sum of n terms of a geometric sequence is given by Sn = a[(r^n - 1)/(r - 1)], where a is the first term, n is the term number and r is the common ratio.

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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[brianmclogan]

haha, had fun re-watching that today. yep makes since

[brianmclogan]

could you explain that a little more? What can I do to make my videos better for you?

[JeopardyJohnson]

Brian thank you thank you thank you. You've have saved me so so so much this semester. You gain a new member

[atharvvarshney_]

Bruh I'm literally watching this video after 11 years☠️

[JAG]

What if the top of the sigma is a really big value like 100... is there a formula or a quick way to solve the sum? Thank you in advance 🙏🏼

[robertr]

Brian why do you have to plug in 4? The next term is 9? 💙🙏

[jasanpahaf]

my math professor very often in times does the same. She argues is hard to write down one thing while saying out loud another.

[jasanpahaf]

lol. awkward moment at 1:21. you gave them the answer for what you were asking for. I guess that's explains the prolonged silence.

[SimonBridge]

Ooh sir ooh sir sir sir ... but sir, you taught us that \sum_{i=1}^6 x_n = 6x_n because sir, the sum is over index i and the index in the sum is an n and they don't match sir... sir? It increments i not n sir...
If you change the index labels sir, how can you expect us not to get confused sir... sir? xD You lucky you don't have smartass students.

Shouldn't it be s_6 = \sum_{i=1}^6 -(-3)^i ...

For those who don't understand the way I am writing equations ... it's TeX markup, copy and paste to a program that uses it like any forum using bbcode [math] tags.
Also ... I guess there's a vid with the infinite sum?