First answer gets the brainliest!
The closed form sum of
$$12 \left[ 1^2 \cdot 2 + 2^2...
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Mathematics, 05.08.2021 03:50 billy12008
First answer gets the brainliest!
The closed form sum of
$$12 \left[ 1^2 \cdot 2 + 2^2 \cdot 3 + \ldots + n^2 (n+1) \right]$$
for $n \geq 1$ is $n(n+1)(n+2)(an+b).$ Find $an + b.$
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