1. ## Sum of 2^x

Hi guys,
What is the Sum of 2^x from x=1 to N?

Thanks

2. Originally Posted by feiyingx
Hi guys,
What is the Sum of 2^x from x=1 to N?

Thanks
this is a geometric series, see here for the formula's to calculate the sum

3. 2^(N+1)-2
=D

Thank you

4. Originally Posted by feiyingx
2^(N+1)-2
=D

Thank you
yes, good