Substitute t D =2 and t D in the series of to obtain the
Chapter , Problem 20(choose chapter or problem)
Substitute t D =2 and t D in the series of to obtain the summations X1 nD1 1 n4 D 4 90 ; X1 nD1 .1/nC1 n4 D 74 720 ; and 1 C 1 34 C 1 54 C 1 74 CD 4 96 : 21. (Od
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