The sum of the first three terms of a strictly increasing G.P. is `alphas` and sum of their squares is `s^2`

The sum of the first three terms of an increasing G.P. is 21 and the sum of their squares is 189. Then the sum of its first n terms is

The sum of the first three terms of an arithmetic progression is 9 and the sum of their squares is 35. The sum of the first n terms of the series can be

The sum of the first three consecutive terms of an A.P. is 9 and the sum of their squares is 35. Find S_(n)

The sum of the first three terms of G.P. is 7 and the sum of their squares is 21. Determine the first five terms of the G:P.

The sum of intinite number of terms of a decreasing G.P.is 4 and the sum of the squares of its terms to infinity is 16/3 find the G.P.

The sum oif the first ten terms of an A.P. is equal to 155, and the sum of the first two terms of a G.P. is 9. Find these progressionsif the first term of the A.P. equals the common ratio of the G.P. and the 1st term of G.P. equals the common difference of A.P.

The sum of three consecutive terms of an A.P. is 21 and the sum of their squares is 165. Find these terms.

The sum of the first three terms of a G.P. is (13)/(12) and their product is -1. Find the G.P.

The sum of first three terms of a G.P. is 16 and the sum of the next three terms is 128. Determine the first term, the common ratio and the sum to n terms of the GP.