Sum of Numbers Formula

[rangaswamyks]

when r>1
then sn=a(r^n-1)/(r--1)
this formula holds good.. here r=3

[beinganangeltreon]

I think he just prepared me for calculus without mentioning it. I'm ignorant, but it was fun.

[FrogworfKnight]

Huh... Where did they derive this formula? Because I know the variation for Infinite Geometric Series in Calculus, and based on this version, it only reinforces the fact that an infinite Geometric series converges when |r|<1 I honestly didn't know (or more likely couldn't remember) that there was a version for finite series.

[Dubai_life_]

Sir, could you upload content of probability theory. It is my favorite subject in math.

[edc]

Is this the same as future value of money?

[Majorillin]

How did you get r =3 is 3 a constant that you use for this formula Ty

[israel]

I thought 3'10 was 1000, but realized that it works for base of 10

[palaiseauivincent]

For sure you know how to make it clear & easy

[kevinsainz]

I wish I had this when I was in high school. Thank you

[sirshakeditz]

Thank you professor ❤❤🎉 I waana your reply ❤❤

[LimbwebweLaban-ngmj]

They are two formulaes so don't we look at the value of r whether it is less or greater than 1

[traveladdkhajuraho]

We can also use formula= Sn=n/2(a+l)

Edit: Thanks for telling me

[rameshs]

Sn=a(r^n-1)/r-1
=3 (3^10 -1)/9
=(3^10-1)/3

[chandu]

Please tell me how to calculate 3¹⁰ fastly

[pierrettebalazut]

Ah! Oui, on fait le calcul pour les 10 premiers chiffres de la suite... c'était pas plus compliqué que ça.
Sinon j'ai bien compris la démonstration.
Merci

[pierrettebalazut]

Je ne comprends pas pourquoi n=10.
Excusez moi je comprends mal l'anglais

[TCTheOrginal]

This formula fails after a certain power

[Gbhmagic]

My teacher was a total &$*$.. and the sequence woukd break down on the last shown number by like .01...he was a jerk