$\"\"$

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(a).

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Find the value of the expression $\"\"$ and $\"\"$ using graphing utility.

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Graph :

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(1) Draw the coordinate plane.

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(2) Graph the functions $\"\"$ .

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$\"\"$

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Observe the garph :

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The values of $\"\"$ and $\"\"$ are :

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$\"\"$ .

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$\"\"$ .

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$\"\"$

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(b).

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The function $\"\"$ is defined for all values in the interval $\"\"$ .

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Let $\"\"$ .

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The function $\"\"$ is defined for all values in the interval $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$ .

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The function $\"\"$ is defined for all values in the interval $\"\"$ .

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$\"\"$

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(a).

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$\"\"$ .

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$\"\"$ .

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(b). The function $\"\"$ is defined for all values in the interval $\"\"$ .