$\"\"$

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The function is $\"\"$ .

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Find $\"\"$ .

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Theorem :

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If $\"\"$ is a one to one differentiable function with inverse function $\"\"$ and $\"\"$ then the inverse function is

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differentiable at $\"\"$ and $\"\"$ .

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Find $\"\"$ .

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Equate the function to $\"\"$ .

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$\"\"$ .

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By trail and error method, the equation is satisfied at $\"\"$ .

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Hence $\"\"$ is the solution of the equation.

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Therefore $\"\"$ then $\"\"$ .

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$\"\"$

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$\"\"$ .

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Differentiate the function with respect to $\"\"$ .

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$\"\"$

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$\"\"$ .

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$\"\"$

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$\"\"$ .

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By the theorem, $\"\"$ .

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$\"\"$ .

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$\"\"$

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$\"\"$ .