Question

Write a formula to find the nth term of a geometric sequence -1/3,1/2,-3/4,9/8​

Answer 1

Explanation:

first term a = -1/3

Ratio r = 1/2÷ (-1/3) = 1/2 * (-3/1) = -3/2

nth term = ar^(n-1)

=(-1/3)*(-3/2)^(n-1)