Question

Which term ofvthe series 128+64+32+…is1/4​

Answer 1

Answer:

10

Step-by-step explanation:

The above sequence is in GP

a=128

r=1/2

an=1/4

also,

an=ar^n-1

=128*1/2^n-1

(by simplyfining the above eqn. we get)

2^n-1=512

2^9=512

thus,

n-1=9

n=10