Prove the Infinite Geometric Series Formula: Sum(ar^n) = a/(1 - r)

Prove the Infinite Geometric Series Formula: Sum(ar^n) = a/(1 - r)

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[towardstar]

why multiply by R? no one ever explains this, just that we do it and it works

[JosephSullivan]

Old video, new visitor. This feels like a derivation instead of a proof. Do I have my wires crossed?

Either way, nice content. Subscribed. 🙂

[pinklady]

That is a good pink neon colour for pen. Much much better and I can see it. Any night-blind students can surely see that colour.

[A.K.]

Can someone explain why that limit towards the end is equal to 0?

[platt-bs]

Shouldn't it be the lim as capital N goes to infinity instead of low n at the end of the proof?

[livefrever_]

Algebraic long division has entered the chat

[pinetrees]

god i hope this is not on this year's psat. im taking it tomorrow, havent taken math in a semester, and have never learned this. im doing calc 1 next semester

[thespeedyyoshi]

is actual magic.

What even is math at this point XD