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Let (1+x+2x^(2))^(20) = a(0)+a(1)x+a(2)x...

Let `(1+x+2x^(2))^(20) = a_(0)+a_(1)x+a_(2)x^(2)+...+a_(40)x^(40)` then `a_(1)+a_(3)+a_(5)+...+a_(39)` is equal to

A

`2^(19) (2^(20) -21)`

B

`2^(20) (2^(19) -19)`

C

`2^(19) (2^(20) +21)`

D

none of these

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The correct Answer is:
a
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ML KHANNA-BINOMIAL THEOREM AND MATHEMATICAL INDUCTION -Self Assessment Test
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