Question

The second and fifth terms of a geometric progression are 1 and 1/8 respectively. Find the

(i) common ratio
(ii) fist term
(iii) eight term

Answer 1

n=2

n8=1/64

x=1/2

Explanation:

N=first term

n*x=1

n*
`x^(4)`=1/8

devide both sides

`x^(3)`=1/8

x=1/2

n/2=1

n=2

n*
`(1/2)^(7)`=1/64