 #1
 470
 30
 Homework Statement:

$$\int ^{10}_{0}f\left( x\right) dx=25$$
Find the value of
$$\int ^{e^{2}}_{1}\dfrac {f\left( 5\times \ln \left( x\right) \right) }{x}dx$$
 Relevant Equations:
 
Not sure how do I start from here, but do I let $$u = lnx$$ and substitute?
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