Find the x-coordinates of all critical points of the given function. Determine whether each critical point is a relative maximum,
minimum, or neither by first applying the second derivative test, and, if the test fails, by some other method.
f(x) = 3x^6 - 5x^4
f has --Select--- at the critical point x = (smaller x-value). The second derivative test --Select---
for this critical point.
f has --Select--- at the critical point x = (larger x-value). The second derivative test --Select--- for
this critical point.
f has --Select--- at the critical point x = (largest x-value). The second derivative test --Select---
