List of top Mathematics Questions on Maxima and Minima asked in AP EAMCET

The minimum value of \(f(x)=x+\dfrac{4}{x+2}\) is
The condition that \(f(x)=ax^3+bx^2+cx+d\) has no extreme value is
The maximum value of
\[ f(x)=\frac{x}{1+4x+x^2} \] is