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If (1-x+x^2)^n=a0+a1x+a2x^2+ .........+a...

If `(1-x+x^2)^n=a_0+a_1x+a_2x^2+ .........+a_(2n)x^(2n),\ ` find the value of `a_0+a_2+a_4+........+a_(2n)dot`

A

`(3^(n)+1)/(2)`

B

`(3^(n)-1)/(2)`

C

`3^(n)-(1)/(2)`

D

`3^(n)+(1)/(2)`

Text Solution

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The correct Answer is:
A
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