Thanks!!
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Use the change of base property and make a simple substitution.
Thanks but
Nope, I mean you use $\displaystyle \log_{10}x=\frac{\ln x}{\ln10}$ The denominator is a constant and you only have to integrate $\displaystyle \frac{\ln x}x$
If there is a third row of division, could I bring it up to the second?
You mean for example $\displaystyle \frac{\dfrac ab}c$? It's the same if we write $\displaystyle \frac ab:c$, then you make a cross product.
Re:
If we have $\displaystyle x=\frac{\dfrac ab}c=\frac a{bc}$ but be careful, if we have $\displaystyle x=\frac a{\dfrac bc}=\frac{ac}b$ It depends.
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