Science:Math Exam Resources/Courses/MATH100/December 2011/Question 05 (d)/Statement

Full-Solution Problems. In questions 2-8, justify your answers and show all your work. Simplification of answers is not required unless explicitly stated.

Let

$\displaystyle y=f(x)=6x^{1/5}+x^{6/5}$

Find the intervals on which y=f(x) is concave up.