Question

find thesum of the series (2³-1)+(4³-3³)-(6³-15³).....to n terms

Answer 1

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Answer 2

$= (2³-1)+(4³-3³)-(6³-15³)$

$= (8 - 1) + (64 - 27) - (216 - 3,375)$

$= 7 + 37 - ( - 3,159)$

$= 7 + 37 + 3,159$

$= 3,203$

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