Question

show that the sumation of i(2^i)= 2+n2^(n+2) at i=1 to n+1

Answer 1

please help! i have chocolate chip cookies

Answer 2

no

Answer 3

\[i * 2^i = 2 +n*2^{n+2}\]

Does the Q look like that?

Answer 4

there is the summation sign in front of the left side

Answer 5

with i=1 to k+1

Answer 6

\[\sum_{i=1}^{n+1} i * 2^i = 2 + n*2^{n+2}\]

?

Answer 7

yes

Answer 8

Cool, ill check it out.

Answer 9

ok thanks

Answer 10

I would use induction. First prove it's true for n=1. Then assume it's true for n. then prove it for n=k+1.

Answer 11

hy ana

Answer 12

u there?