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Let n be a positive integer such that (1...

Let n be a positive integer such that `(1+x+x^2)^n=a_0+a_1x+a_2x^2+…….+a_(2n)x^(2n)` then `sum_(r=0)^(2n) a_r`is

A

`(3^n+1)/2`

B

`(3^n-1)/2`

C

`(1-3^n)/2`

D

`3^n+(1/2)`

Text Solution

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The correct Answer is:
A
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PATHFINDER-BINOMIAL THEOREM-QUESTION BANK
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