Final answer:
To find critical numbers of a function, use the derivative of the function and find the values where it is zero or undefined.
Step-by-step explanation:
The correct way to find critical numbers of a function is by using the derivative of the function. Critical numbers occur when the derivative is either zero or undefined. To find these critical numbers, follow these steps:
- Find the derivative of the function.
- Set the derivative equal to zero and solve for the variable to get the values where the derivative is zero.
- Check if there are any values where the derivative is undefined, such as points where the denominator of the derivative function is zero.
- The values obtained from steps 2 and 3 are the critical numbers of the function.