I am suppose to use Rolle's Theorem and then find all numbers c that satisfy the conclusion of the theorem.
$f(x) = x^4 +4x^2 + 1 [-3,3]$
Polynomials are always going to satisfy the theorem.
The derivative is
$4x^3 + 8x$ and the only number that could possibly make that zero would be zero so the answer is 0.
What did I get wrong? I failed my calc test and this was one of the one's I got wrong.