Question

. The sum of infinity of G.S is 15, 1st term is 3 then the common ratio is.​

Answer 1

Explanation:

We know ,

=> Sum = a / 1 - r

=> 15 = 3/1-r

=> 15 - 15r = 3

=> 15r = 18

=> r = 18/15

=> r = 6/5