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Let n in N. If (1+x)^(n)=a(0)+a(1)x+a(x)...

Let `n in N`. If `(1+x)^(n)=a_(0)+a_(1)x+a_(x)x^(2)+ . . . .+a_(n)` `x^(n) and a_(n-3),a_(n-2),a_(n-2),a_(n-1)` are in A.P. then:

A

`a_(1),a_(2),a_(3)` are in A.P.

B

`a_(1),a_(2),a_(3)` are in H.P.

C

n=6

D

n=14

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The correct Answer is:
A
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