For what values of r, does the formula for infinite G.P. valid ?

If |r|<1, then the sum of infinite terms of G.P is

What is the formula for .^(n)P_(r) ?

When r ne 1 , the formula for finding sum to n terms of a G.P. is ……..

When r = 1 , the formula for finding sum to n terms of a G.P. is …….

What is the value and dimesional formula of g?

In an infinite G.P. the sum of first three terms is 70. If the externme terms are multipled by 4 and the middle term is multiplied by 5, the resulting terms form an A.P. then the sum to infinite terms of G.P. is :

In an infinite G.P. the sum of first three terms is 70. If the externme terms are multipled by 4 and the middle term is multiplied by 5, the resulting terms form an A.P. then the sum to infinite terms of G.P. is :

The first term of an infinite G.P. is a and its sum is 3, then-

Consider an infinite G.P with first term a and common ratio r,(-1ltrlt1) If the sum of the given infinite G.P is 15 and the sum of squares of its terms is 45, find a and r