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Example 10.40: Solving
To solve a logarithmic equation with logarithms on both sides, such as , condense each side into a single logarithm. First, apply the Quotient Property on the left side to get . Next, use the Power Property on the right side to rewrite as , which simplifies to . Now, apply the One-to-One Property of Logarithmic Equations: since , it must be true that . Solve this rational equation by multiplying by the common denominator to obtain , which expands to . Rearranging into standard form yields . Factoring gives , resulting in potential solutions and . Checking these in the original equation, results in taking the logarithm of a negative number (e.g., ), making it an extraneous solution. The only valid solution is .
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Ch.10 Exponential and Logarithmic Functions - Intermediate Algebra @ OpenStax
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Example 10.40: Solving
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A laboratory technician is analyzing the growth of a bacterial culture using the logarithmic equation , where represents the growth factor. Arrange the following steps in the correct order to solve this equation using the condensing method.
A small business owner is using the logarithmic equation to determine the target number of units to sell each month to reach a profit goal. According to the rules for solving logarithmic equations by condensing, which of the following is the correct first step to combine the terms on the left side of the equation?
A data analyst is simplifying logarithmic growth models to predict future trends. To solve these equations, the analyst must condense multiple logarithmic terms into a single expression. Match each logarithmic property with the correct rule used to condense the terms.
A civil engineer comparing the density of two soil layers uses the equation . To begin solving this by condensing the left side into the single expression , the engineer must apply the ____ Property of Logarithms.
An operations manager is creating a technical reference guide for inventory forecasting models. The guide states that when solving an equation with multiple logarithmic terms on one side, the correct procedure is to first convert each individual logarithmic term into its equivalent exponential form before attempting to combine them.
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A logistics software engineer is analyzing a growth algorithm and needs to solve the following equation to determine a specific system parameter : . Arrange the steps below in the correct chronological order to find the valid solution.
An inventory forecasting algorithm relies on the equation to determine a critical reorder parameter, . During a manual audit, a supply chain technician solves the equation algebraically and generates two potential mathematical answers: and . What key mathematical rule must the technician recall to identify the valid parameter?
A lab technician is calibrating a sensor that follows a logarithmic response curve. To find the equilibrium point , the technician must solve the equation . Match each step of the algebraic verification with the logarithmic property or rule that justifies it.
A biomedical researcher is using the logarithmic model to determine the growth rate of a cell population. After solving the equation algebraically, the researcher finds two potential roots: and . The researcher must reject because it results in the logarithm of a negative number in the original equation, making it an ____ solution.
Identifying Logarithmic Properties in System Optimization