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For the function \( g(x)=\frac{x+9}{x-5} \), solve the following inequality. \( g(x)>0 \)

Ask by Nunez Todd. in the United States
Mar 20,2025

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Tutor-Verified Answer

Answer

The solution to \( g(x) > 0 \) is \( x < -9 \) or \( x > 5 \).

Solution

Solve the equation \( \frac{x+9}{x-5}>0 \). Solve the inequality by following steps: - step0: Solve the inequality by testing the values in the interval: \(\frac{x+9}{x-5}>0\) - step1: Find the domain: \(\frac{x+9}{x-5}>0,x\neq 5\) - step2: Set the numerator and denominator of \(\frac{x+9}{x-5}\) equal to 0\(:\) \(\begin{align}&x+9=0\\&x-5=0\end{align}\) - step3: Calculate: \(\begin{align}&x=-9\\&x=5\end{align}\) - step4: Determine the test intervals: \(\begin{align}&x<-9\\&-95\end{align}\) - step5: Choose a value: \(\begin{align}&x_{1}=-10\\&x_{2}=-2\\&x_{3}=6\end{align}\) - step6: Test the chosen value: \(\begin{align}&x<-9\textrm{ }\textrm{is the solution}\\&-95\textrm{ }\textrm{is the solution}\end{align}\) - step7: The final solution is \(x \in \left(-\infty,-9\right)\cup \left(5,+\infty\right):\) \(x \in \left(-\infty,-9\right)\cup \left(5,+\infty\right)\) - step8: Check if the solution is in the defined range: \(x \in \left(-\infty,-9\right)\cup \left(5,+\infty\right),x\neq 5\) - step9: Find the intersection: \(x \in \left(-\infty,-9\right)\cup \left(5,+\infty\right)\) The solution to the inequality \( g(x) > 0 \) is \( x \in (-\infty, -9) \cup (5, \infty) \).

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To solve the inequality \( g(x) > 0 \) for the function \( g(x) = \frac{x + 9}{x - 5} \), we need to determine when the fraction is positive. This occurs when both the numerator and the denominator have the same sign. 1. **Numerator**: \( x + 9 > 0 \) leads to \( x > -9 \). 2. **Denominator**: \( x - 5 > 0 \) leads to \( x > 5 \). Now, we incorporate both inequalities: - The numerator is positive when \( x > -9 \). - The denominator is positive when \( x > 5 \). Thus, for \( g(x) \) to be positive overall, we need \( x > 5 \). However, we also have to consider the scenario when both the numerator and denominator are negative. 1. **Numerator**: \( x + 9 < 0 \) leads to \( x < -9 \). 2. **Denominator**: \( x - 5 < 0 \) leads to \( x < 5 \). Here, the numerator is negative for \( x < -9\) and the denominator is negative for \( x < 5\). Both conditions are satisfied when \( x < -9 \). Finally, the solution to \( g(x) > 0 \) can be summarized as: \[ x < -9 \quad \text{or} \quad x > 5. \] Therefore, the solution to the inequality \( g(x) > 0 \) is: \[ (-\infty, -9) \cup (5, \infty). \]

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