Question

the 7th term of the series 1,-1/2,1/4.....is

Answer 1

1,-1/2,1/4,-4/5,4/6,-6/7,6/8,-8

Answer 2

a1= 1
a2= -1/2
d= a2-a1. = -1/2-1 = -1.5
7 term = a+ (n-1) d
= 1+(7-1) × (-1.5)
= 1 - 6× 1.5
= -89