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Summarize the pertinent information obtained by applyirg the graphing stialegy and skotch the graph of \( \mathrm{y}=\mathrm{f}(\mathrm{x}) \). \[ f(x)=\ln (x+3)-2 \] Select the correct choice below and, if necessary, fill in the answer box to completo your choice. A. The doman of \( f \) is \( (-3, \infty) \) (Type your answer in interval notation. Use a comma lo separate answers as needed.) B. The domain of \( f \) is empty Select the correct choice below and, if necessary, fill in the answer box to complote your choice. A. The \( x \)-intercept(s) oif is \( x= \) \( \square \) . (Type an exact answer. Use a comma lo separale answers as needed.) B. The function I has no \( x \)-intercepts.

Ask by Frank Rogers. in the United States
Mar 11,2025

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Answer

The domain of \( f \) is \( (-3, \infty) \) and the \( x \)-intercept is \( x = e^2 - 3 \).

Solution

1. Determine the domain of \( f(x) = \ln(x+3)-2 \): - The argument of the logarithm, \( x+3 \), must be positive: \[ x+3 > 0 \quad \Rightarrow \quad x > -3. \] - Thus, the domain is: \[ (-3, \infty). \] 2. Find the \( x \)-intercept(s): - Set \( f(x) = 0 \) and solve: \[ \ln(x+3)-2 = 0 \quad \Rightarrow \quad \ln(x+3)=2. \] - Exponentiate both sides to remove the logarithm: \[ x+3 = e^2. \] - Solve for \( x \): \[ x = e^2 - 3. \] Domain Selection: A. The domain of \( f \) is \( (-3, \infty) \). \( x \)-Intercept Selection: A. The \( x \)-intercept of \( f \) is \( x=e^2-3 \).

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To graph \( f(x) = \ln(x + 3) - 2 \), let's first determine the domain. The natural logarithm function, \( \ln(x + 3) \), is only defined when its argument is greater than 0. So, \( x + 3 > 0 \) yields \( x > -3 \). Therefore, the domain of \( f \) is indeed \( (-3, \infty) \). Next, for the \( x \)-intercepts, we set \( f(x) = 0 \): \[ \ln(x + 3) - 2 = 0 \] This simplifies to \( \ln(x + 3) = 2 \). Exponentiating both sides gives \( x + 3 = e^2 \), leading to \( x = e^2 - 3 \). Hence, the \( x \)-intercept is \( x = e^2 - 3 \). Now, to summarize: A. The domain of \( f \) is \( (-3, \infty) \). A. The \( x \)-intercept is \( x = e^2 - 3 \).

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