$\"\"$

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

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Consider $\"\"$ .

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Apply derivative on each side with respect to $\"\"$ .

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$\"\"$

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The function $\"\"$ is differentiable for all values of $\"\"$ except $\"\"$ .

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$\"\"$

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The general solution of $\"\"$ is $\"\"$ .

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$\"\"$

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The function $\"\"$ is differentiable for all values of $\"\"$ except at $\"\"$ , where $\"\"$ is the integer.

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$\"\"$

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Consider $\"\"$ .

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Apply derivative on each side with respect to $\"\"$ .

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$\"\"$

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The function $\"\"$ is differentiable for all values of $\"\"$ except at $\"\"$ .

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$\"\"$

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The function $\"\"$ is differentiable for all values of $\"\"$ except at $\"\"$ , where $\"\"$ is the integer.

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The function $\"\"$ is differentiable for all values of $\"\"$ except at $\"\"$ .