### Home > CALC > Chapter 4 > Lesson 4.1.2 > Problem 4-23

4-23.

*f*(*x*) has a cusp at *x* = 3, so *x* '(*x*) should have a jump at

*x* = 3.

The max and min on a smooth continuous graph are the location of zeros on the derivative graph.

4-23.

*f*(*x*) has a cusp at *x* = 3, so *x* '(*x*) should have a jump at

*x* = 3.

The max and min on a smooth continuous graph are the location of zeros on the derivative graph.