If ∫1x(logx)2−2logx+102dx=154tan−1(f(x))+3(logx−1)g(x)+C then f(e)+g(e)=−−−
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a
9
b
1
c
0
d
None
answer is A.
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Detailed Solution
∫1x(logx)2−2logx+102dxlogx=t⇒1xdx=dtI=∫1(t−1)2+92dt Put t−1=3tanθdt=3sec2θdθI=∫3sec2θ9sec2θ2dθ=127∫cos2θdθ=127∫12+12cos2θdθ=154θ+sin2θ2+C=154tan−1t−13+122tanθ1+tan2θ+C=154tan−1t−13+3(t−1)t2−2t+10+Cf(x)=logx−13,g(x)=(logx)2−2logx+10