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  3. 2 identities k mm 1 and mam...

Question: 2 identities k mm 1 and mam...

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2. Identities Σ k- [m(m + 1)] and ΣΗ% [ma(m+ 1)(2m + 1)] are given. 1)l and m(m +1) (2m +1)] are given k-1 (a) First write the sum 2+52+8+++(6n+2)2 in sigma notation and then use the identities to prove that 22 +53+8+ 112+(6n+2)- (2n+ 1)(122+ 15n +4). 25 (b) Use the identities to evaluate the sunn Σ (Sj-65)2-6]
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