Question

How do you get from 2^(k)-1 + 2^(k) to 2^(k+1)-1? Please help I've been stuck for a while.

Answer 1

\[2^{k-1}+2^k\]

Answer 2

Is that it?

Answer 3

The minus 1 is not an exponent

Answer 4

\[2^k-1+2^k\]

Answer 5

Yes

Answer 6

What is x^2+x^2?

Answer 7

2x^2

Answer 8

What is 2^k+2^k ?

Answer 9

4^k