Question

the value of the expression 2 (2 over sideways M over n=0) (n squared +2 to the power of n) is


please explain how you got your answer

Answer 1

\[2\sum_{n=0}^{2}(n ^{2}+2^{n})\]

Answer 2

^this is the equation i was trying to write

Answer 3

substitute 0 for n, 1 for n, 2 for n then add the results and multiply by 2
2((0+1) + (1 + 2) + (4 + 4))

Answer 4

ok thank you so much peachpi

Answer 5

\[2\sum_{n=0}^{2}(n ^{2}+2^{n})\\
=2\Big[\big(0^2+2^0\big)+\big(1^2+2^1\big)+\big(2^2+2^2\big)\Big]\\
=\]