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PrecalculusSuperchallengeSequences, Series, and the Binomial Theorem

Sequences, Series, and the Binomial Theorem · Superchallenge problem

Verify that 2k+1k2(k+1)2=1k2−1(k+1)2\dfrac{2k+1}{k^2(k+1)^2}=\dfrac{1}{k^2}-\dfrac{1}{(k+1)^2}, then evaluate ∑k=1n2k+1k2(k+1)2\displaystyle\sum_{k=1}^{n}\frac{2k+1}{k^2(k+1)^2} and its infinite value.