Question

Please help!!! Will Medal!!

Here is a series written in summation notation:

Answer 1

A

Answer 2

2^1=2
2^2=4
2^3=8

Answer 3

All you have to do is replace the variable with whatever number it says it equals, then from there you just add the next one,

\[2^1+2^2+2^3+...+2^100\]

Answer 4

2+4+8+......+2^100