I was trying to figure out the step between these two equal expression:
$(2k)\cdot 2^{k+1} = k\cdot 2^{k+2}$
I was trying to figure out the step between these two equal expression:
$(2k)\cdot 2^{k+1} = k\cdot 2^{k+2}$
HINT A number raised to an exponent tells you how many times to multiply that number by itself.
For example: $2^{k}=2*2*...*2$ k-times, so $2*2^{k}=2*(2*2*...*2)$ a total of $k+1$ times so $2*2^{k}=2^{k+1}$