Solution
= Solution
For the real <natural logarithm> the domain is $x>0$. The <chain rule> gives
$$
\boxed{\frac{d}{dx}\ln(x^3)=\frac{3x^2}{x^3}=\frac3x.}
$$
= Solution
For the real <natural logarithm> the domain is $x>0$. The <chain rule> gives
$$
\boxed{\frac{d}{dx}\ln(x^3)=\frac{3x^2}{x^3}=\frac3x.}
$$