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If (1+3x-2x^(2))^(10)=a(0)+a(1)x+a(2)x^(...

If `(1+3x-2x^(2))^(10)=a_(0)+a_(1)x+a_(2)x^(2).+…+a_(20)x^(20)` then prove that
`a_(0)+a_(1)+a_(2)+……+a_(20)=2^(10)`

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AAKASH SERIES-BINOMIAL THEOREM-SOLVED EXAMPLES
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  17. Prove that sum(r = 0)^n r^2 . Cr = n (n +1).2^(n-2)

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  18. Prove that sum(r = 0)^n r^3 . Cr = n^2 (n +3).2^(n-3)

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