please try to solve these questions.
Hello, m777!
2) Find if
Differentiate implicitly: .
Then: .
Factor: .
Therefore: .
3) a) What are the critical points of ?
b) On what interval(s) is increasing or decreasing?
. . . .
(a) Critical points occur where
. . .This happens when: .
To the left of , we have: . .Decreasing:
Between and , we have: . .Increasing:
To the right of , we have: . .Increasing:
Therefore:
. . is decreasing on
. . is increasing on