Hello. I don't know how to solve this problem. Please help me. $\displaystyle \int \frac{3^{lnx}}{x}~dx $
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make $\displaystyle u = \ln(x) \implies \frac{du}{dx} = \frac{1}{x}$
Originally Posted by appplejack Hello. I don't know how to solve this problem. Please help me. $\displaystyle \int \frac{3^{lnx}}{x}~dx $ substitution ... let $\displaystyle u = \ln{x}$
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