EAMCET Engineering 2008 Solved Paper

Section: Mathematics

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Question : 86 of 160

Marks: +1, -0

For any integer n≥1, the sum

n

∑

k=1

k(k+2) is equal to

‌
n(n+1)(n+2)
6
‌
n(n+1)(2n+1)
6
‌
n(n+1)(2n+7)
6
‌
n(n+1)(2n+9)
6

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