WBJEE 2019 Math Solved Paper

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Question : 68 of 75

Marks: +1, -0

Let In=

1

∫

0

xntan−1xdx. If anIn+2+bnIn=cn for all n ≥ 1, then

a1,a2,a3 are in G.P.
b1,b2,b3 are in A.P.
c1,c2,c3 are in H.P.
a1,a2,a3 are in A.P

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