$\"\"$

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The two functions are $\"\"$ and $\"\"$ .

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The functions $\"\"$ and $\"\"$ are continuous for all real $\"\"$ .

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Properties of continuity:

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(a) If $\"\"$ and $\"\"$ are continuous at $\"\"$ , then $\"\"$ is continuous at $\"\"$ .

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The functions $\"\"$ and $\"\"$ are continuous for all real $\"\"$ .

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Hence, $\"\"$ is continuous for all real $\"\"$ .

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$\"\"$

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The two functions are $\"\"$ and $\"\"$ .

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The functions $\"\"$ and $\"\"$ are continuous for all real $\"\"$ .

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Properties of continuity:

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(a) If $\"\"$ and $\"\"$ are continuous at $\"\"$ , then $\"\"$ is continuous at $\"\"$ , except $\"\"$ .

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If $\"\"$ , then $\"\"$ is undefined.

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$\"\"$ is continuous for all values of $\"\"$ , except $\"\"$ .

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$\"\"$

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Let the functions be $\"\"$ and $\"\"$ .

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The functions $\"\"$ and $\"\"$ is continuous for all values of $\"\"$ .

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$\"\"$ is continuous for all values of $\"\"$ , except $\"\"$ .

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$\"\"$ is not continuous at $\"\"$ .

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$\"\"$

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(a) $\"\"$ is continuous for all real $\"\"$ .

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(b) $\"\"$ is continuous for all values of $\"\"$ , except at $\"\"$ .