Question

Find the nth and the 15th term of the series 1-1/2+1/4-1/8...(G.P)

Answer 1

Given GP series 1,-1/2,1/4,-1/8

a=1 r=-1/2/1=1/2

nth termof GP=ar to the power n-1

nth term=1×(1/2)power n-1

15th term=ar power14

=1×(1/2)power14

Answer 2

Answer:

Step-by-step explanation:

Given GP series 1,-1/2,1/4,-1/8

a=1 r=-1/2/1=1/2

nth termof GP=ar to the power n-1

nth term=1×(1/2)power n-1

15th term=ar power14

=1×(1/2)power14