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π2 COSNX αν -π <<παnd Σ=1,2 n=1 μη=2 3 η 2 η ο If x2 . + 4 Σ-(-1)* then show that Ena (2n-1)2 1 =1 8.
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answerhappygod
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π2 COSNX αν -π <<παnd Σ=1,2 n=1 μη=2 3 η 2 η ο If x2 . + 4 Σ-(-1)* then show that Ena (2n-1)2 1 =1 8.
π2 COSNX αν -π <<παnd Σ=1,2 n=1 μη=2 3 η 2 η ο If x2 . + 4 Σ-(-1)* then show that Ena (2n-1)2 1 =1 8.
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