Solve the exponential equation. Express the solution in terms of natural logarithms. Then, use a calculator to obtain a decimal approximation for the solution.

e^x = 20.9

What is the solution in terms of natural logarithms?

The solution set is { }.

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  1. Take ln of both sides.

    ln of e^x is x

    x = ln 20.9

    Use a calculator to find x by taking the ln of 20.9

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  2. simply convert e^x = 20.9
    to the corresponding logarithmic equation.
    You MUST know how to do this.

    then simply use your calculator

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