Question

what is the sum of first eight terms of the series 1-1/2+1/4-1/8+.....?​

Answer 1

Answer:

85/128

Step-by-step explanation:

First eight term are

=1 - 1/2 + 1/4 - 1/8 +1/16 -1/32+1/64 - 1/128

=1/2 + 1/8 +1/32+1/128

=5/8 + 5/128

=85/128

Hope it may be helps you :-)