Science:Math Exam Resources/Courses/MATH100/December 2018/Question 05 (b)/Statement

Let $\displaystyle f(x)=x^{\frac {9}{7}}+{\frac {9x^{\frac {2}{7}}}{2}}.$ (b) Find the $x$ and $y$ for all the point(s) where $f(x)$ has a local minimum or local maximum, clearly indicating which point(s) are local minima and which point(s) are local maxima.