2 questions : is the function f(x) = 3-3x-x^3 an increasing or decreasing function. Explain your answer

Question

increasing and decreasing functions

 

Answer 1

You must find y', which gives slope, and analyze its behavior over the various intervals of that polynomial of degree 2.

Intervals of study are determined by the key points where y' = 0 (i.e. its roots).