$\"\"$

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The limit expressions are $\"\"$ and $\"\"$ .

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(a)

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Specified conditions is $\"\"$ .

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Determine differential functions $\"\"$ and $\"\"$ that satisfiy the specified conditions.

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Let $\"\"$ and $\"\"$ .

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$\"\"$

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Thus the condition is satisfied.

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$\"\"$

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(b)

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Specified conditions is $\"\"$ .

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Determine differential functions $\"\"$ and $\"\"$ that satisfiy the specified conditions.

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Let $\"\"$ and $\"\"$ .

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$\"\"$

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$\"\"$ .

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Thus the condition is satisfied.

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$\"\"$

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(c)

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Specified conditions is $\"\"$ .

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Determine differential functions $\"\"$ and $\"\"$ that satisfiy the specified conditions.

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Let $\"\"$ and $\"\"$ .

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$\"\"$

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Thus the condition is satisfied.

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$\"\"$

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(a) Let $\"\"$ and $\"\"$ .

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(b) Let $\"\"$ and $\"\"$ .

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(c) Let $\"\"$ and $\"\"$ .