Question

If the sum of the first two terms of a G.P. is -4 and the fifth term is 4 times the third term , find the G.P.

Answer 1

Answer:

A. T. Q

a+ar = -4.... (1)

ar^4 = 4ar^2=> r^2 = 4 => r = 2 or -2

put in (1) , If r = 2, a=-4/3

If r= -2 , a= 4

GP is -4/3,-8/3,-16/3,.... or 4,-8,16,...