Practice problem
Use the derivative test to find the local maximum points of the function f(x)=14x4+x3−92x2−27x+9f(x)=\frac14x^4+x^3-\frac92x^2-27x+9f(x)=41x4+x3−29x2−27x+9
(−3,42.75)(-3,42.75)(−3,42.75)
(0,9)(0,9)(0,9)
(3,−65.25)(3,-65.25)(3,−65.25)
None\text{None}None
Type a concept, like “slope” or “photosynthesis”.
