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[" 5.I'sum of all the coefficient of eve...

[" 5.I'sum of all the coefficient of even powers in "(1-x+x^(2)-x^(3))" ."x^(2n)(1+x+x^(2)+x^(3)-x+x^(2n))" is "61],[" then "n" is equal to "],[[" (1) "30," (2) "32," (3) "28," (4) "36]]

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