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a
xlog(logx)+x(logx)−1+c
b
xlog(logx)−(logx)−1+c
c
xlog(logx)−x(logx)−1+c
d
None of these
answer is C.
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Detailed Solution
∫log(logx)+1(logx)2dx=∫1⋅log(logx)dx+∫dx(logx)2 (apply uv rule to the first integrand)=xlog(logx)−∫1xlogxxdx+∫dx(logx)2+c=xlog(logx)−∫(logx)−1dx+∫dx(logx)2+c=xlog(logx)−x(logx)−1+∫(logx)−2dx+∫(logx)−2dx=xlog(logx)−x(logx)−1+c