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[" Given "(1-2x+5x^(2)-10x^(3))(1+x)^(4)...

[" Given "(1-2x+5x^(2)-10x^(3))(1+x)^(4)=1+a_(1)x+a_(2)x^(2)+..." and that "a_(1)^(2)=2a_(2)" ,then the value of "a" is "],[[" (A) "6," (B) "2," (C) "5," (D) "3]]

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