Find f′(x)f'(x)f′(x) for f(x)=log10(5x3)f(x) = \log_{10}(5x^3)f(x)=log10(5x3).
3xln10\frac{3}{x\ln 10}xln103
3x\frac{3}{x}x3
15x2ln10\frac{15x^2}{\ln 10}ln1015x2
3ln(5x3)x\frac{3\ln(5x^3)}{x}x3ln(5x3)