anonymous one year ago Help please??? Find S10 for the series 1 + 2 + 4 + 8 +...

1. anonymous

it is a G.P a=1 r=2/1=2 $Sn=\frac{ a \left( r^n-1 \right) }{ r-1 }$ n=10 solve it

2. anonymous

@surjithayer I got 102, is that right?

3. anonymous

*1023

4. anonymous

correct.