Question

Answer 1

a) `A=1/2-1/4+1/8-1/16+1/32-1/64`

`=> 2A=1-1/2+1/4-1/8+1/16-1/32`

`=> 2A+A=(1-1/2+1/4-1/8+1/16-1/32)+(1/2-1/4+1/8-1/16+1/32-1/64)`

`=> 3A=1-1/64<1`

`=> A<1/3`