Question

Find r for the geometric series with

Answer 1

Same formula

Answer 2

just that, here sum is given, and you need to find r

Answer 3

give it a try :)

Answer 4

\(\large S_n = a_1(\frac{1-r^n}{1-r})\)

Answer 5

okay. where would i put the sum? where the s is?

Answer 6

Yep

Answer 7

\(a_1 = 4\)

\(n = 5\)

\(S_n = S_5 = 244\)

Answer 8

there is another way to do this problem , but lets do it the way we did this before first :)

Answer 9

u knw wat, i got second thoughts about this method. it wont work

Answer 10

lets do the other way :)

Answer 11

j