# What are the critical points for #f(x) = xsqrt(16 - x^2)#?

##### 1 Answer

Jun 26, 2015

The critical numbers are

#### Explanation:

Critical numbers for a function,

For,

# = sqrt(16-x^2)/1 - x^2/sqrt(16-x^2)#

# = (16-2x^2)/sqrt(16-x^2)#

**Derivative is 0**

Which happens at

Both

**Derivative does not exist**

Both