### Home > CALC > Chapter 11 > Lesson 11.2.4 > Problem 11-90

11-90.

Set *y″* = 0 and solve for *x*.

It may seem like there are two possible answers. Graph the function to check your results.

11-90.

Set *y″* = 0 and solve for *x*.

It may seem like there are two possible answers. Graph the function to check your results.