Question

The first term of a G.P. is 81 and the square of the third term is equal to its first term. Find the sixth term of the G.P?

Answer 1

Hope it helps you....

Answer 2

since square of 3rd term is the first term, third term must be √81 = 9
the GP is 81, 27, 9.... with common ratio 1/3.
the sixth term will be 1/3.

Hope it helped!