1.

Let I_(n)=int_(0)^(1)x^(n)tan^(-1)xdx. If a_(n)I_(n+2)+b_(n)I_(n)=c_(n) for all n ge 1, then

Answer»

`a_(1), a_(2), a_(3)` are in G.P
`b_(1), b_(2), b_(3)` are in A.P
`c_(1), c_(2), c_(3)` are in H.P
`a_(1), a_(2), a_(3)` are in A.P

Answer :B::D


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