Find the derivative of f(x)=ln(x3+2x)f(x) = \ln(x^3 + 2x)f(x)=ln(x3+2x) with respect to xxx.
3x2+2x3+2x\frac{3x^2+2}{x^3+2x}x3+2x3x2+2
3x2+2x3+2x2\frac{3x^2+2}{x^3+2x^2}x3+2x23x2+2
1x3+2x\frac{1}{x^3+2x}x3+2x1
3x2x3+2x\frac{3x^2}{x^3+2x}x3+2x3x2