Question

Please help!! Will Medal!!

What is the sum of this infinite geometric series?

Answer 1

Use the formula

\[\Large S = \frac{a}{1-r}\]

a = first term
r = common ratio

Answer 2

First term is what?
r is...?

Answer 3

the first term is when i = 1

what is the value of the expression when i = 1?

Answer 4

the common ratio is r = 0.9

Answer 5

Sorry just got back on here

Answer 6

no worries

Answer 7

I am getting 0.1...this is not right

Answer 8

\[\Large S = \frac{a}{1-r}\]

\[\Large S = \frac{0.9}{1-0.9}\]

\[\Large S = ???\]

Answer 9

hopefully you see how I got a = 0.9, r = 0.9

Answer 10

It's 9. Thanks.

Answer 11

correct