### All Precalculus Resources

## Example Questions

### Example Question #1 : Special Functions

Let

What does equal when ?

**Possible Answers:**

**Correct answer:**

Because 3>0 we plug the x value into the bottom equation.

### Example Question #2 : Special Functions

Let

What does equal when ?

**Possible Answers:**

**Correct answer:**

Because we use the first equation.

Therefore, plugging in x=0 into the above equation we get the following,

.

### Example Question #3 : Special Functions

Determine the value of if the function is

**Possible Answers:**

**Correct answer:**

In order to determine the value of of the function we set

The value comes from the function in the first row of the piecewise function, and as such

### Example Question #4 : Piecewise Functions

Determine the value of if the function is

**Possible Answers:**

**Correct answer:**

In order to determine the value of of the function we set

The value comes from the function in the first row of the piecewise function, and as such

### Example Question #981 : Pre Calculus

For the function defined below, what is the value of when ?

**Possible Answers:**

8

0

3

-2

7

**Correct answer:**

8

Evaluate the function for . Based on the domains of the three given expressions, you would use , since is greater than or equal to .