[" 7.If "m" and "n" are "+" ve integers ...

[" 7.If "m" and "n" are "+" ve integers and "m>n" and if "],[(1+x)^(m+n)(1-x)^(m-n)" is expanded as a "],[" polynomial in "x," then the coefficient of "x^(2)" is "],[" 1) "2m^(2)-n2)2n^(2)-m" 3) "2m^(2)+n" 4) "2n^(2)+m]

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[" 7.If "m" and "n" are "+" ve integers and "m>n" and if "],[(1+x)^(m+n)(1-x)^(m-n)" is expanded as a "],[" polynomial in "x," then the coefficient of "x^(2)" is "],[" 1) "2m^(2)-n2)2n^(2)-m" 3) "2m^(2)+n" 4) "2n^(2)+m]

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