Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
Determine all open intervals on which
f
(
x
)
=
x
4
−
4
x
3
f(x)=x^{4}-4x^{3}
f
(
x
)
=
x
4
−
4
x
3
is (i) increasing and (ii) concave up.
Browse the problem library