Problem

Solve the following exponential equation. Express the solution set in terms of natural logarithms or common logarithms. Then, use a calculator to obtain a decimal approximation for the solution. \[ 7^{x}=109 \]

Solution

Step 1 :Given the exponential equation \(7^{x}=109\).

Step 2 :We can use the property of logarithms that says the logarithm of a number to a certain base is the exponent to which the base must be raised to get the number. In other words, if \(b^y = x\), then \(\log_b{x} = y\). So, we can take the natural logarithm (or common logarithm) of both sides of the equation to solve for \(x\).

Step 3 :Applying this to our equation, we get \(x = \log_{7}{109}\).

Step 4 :Using a calculator to solve this, we get \(x \approx 2.41\).

Step 5 :\(\boxed{x \approx 2.41}\) is the solution to the equation \(7^{x}=109\).

From Solvely APP
Source: https://solvelyapp.com/problems/13467/

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