Pre-Calculus, 9th edition
21

 PAGE: 77 SET: Exercises PROBLEM: 21

Find -intercept :

-intercept : The point where .

Observe the graph of the function.

The -intercepts are and .

Find -intercept :

-intercept : The point where .

Observe the graph of the function.

The -intercept is .

All possible values of is the domain of a function.

The domain is or .

Range is the corresponding values of the function for different values of .

The range is or .

The function is increasing for all values of between to and to .

The function is increasing over the intervals and .

The function is decreasing for all values of between to and to .

The function is decreasing over the intervals and .

If the graph is symmetric about -axis, then it is an even function.

If the graph is symmetric about origin, then it is an odd function.

Observe the graph of the function.

The graph is symmetric about -axis, thus it is an even function.

-intercepts : and .

-intercept : .

The domain is or .

The range is or .

The function is increasing over the interval and .

The function is increasing over the interval and .

Even.

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