### Home > CALC > Chapter 11 > Lesson 11.2.4 > Problem11-90

11-90.

Multiple Choice: No calculator! A point of inflection for the curve $y = \frac { 12 } { x ^ { 2 } + 4 }$ is:

1. $( - \frac { 2 \sqrt { 3 } } { 3 } , \frac { 9 } { 4 } )$

1. $( \frac { 2 \sqrt { 3 } } { 3 } , - \frac { 9 } { 4 } )$

1. $(0,3)$

1. $( \sqrt { 2 } , 2 )$

1. $( - \sqrt { 2 } , 2 )$

Set $y^{\prime\prime} = 0$ and solve for $x$.
It may seem like there are two possible answers. Graph the function to check your results.