Step 1:

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The functions are $\"\"$ .

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Inverse function of $\"\"$ :

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$\"\"$

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Change $\"\"$ to $\"\"$ .

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$\"\"$ .

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Interchange $\"\"$ and $\"\"$ .

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$\"\"$ .

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Solve for $\"\"$ .

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$\"\"$

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Divide each side with 50000.

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$\"\"$ .

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Apply natural logarithm on each side.

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$\"\"$

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Use the logarithm rules : $\"\"$ .

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$\"\"$

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Interchange the base of logarithm : $\"\"$ .

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$\"\"$

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$\"\"$ \ \

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Change $\"\"$ to $\"\"$ .

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$\"\"$

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$\"\"$ \ \

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Solution:

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$\"\"$ .

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