Question
upstudy study bank question image url

Find \( g(0), g(-5), g(7) \), and \( g\left(\frac{3}{2}\right) \) for \( g(x)=\frac{x}{\sqrt{25-x^{2}}} \). Find \( g(0) \). Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. \( g(0)=\square \) \( \quad( \) Simplify your answer. Type an exact answer, using radicals as needed.) B. \( g(0) \) does not exist. C. \( g(0) \) is not a real number. A. \( g(-5) \). Select the correct choice below and, if necessary, fill in the answor box to complete your choice. B. \( \quad( \) Simplify your answer. Type an exact answer, using radicals as needed.) B( -5\( ) \) does not exist. C. \( g(-5) \) is not a real nurnber. Find \( g(7) \) Select the correct choice below and, if necessary, fill in the answer box to complete your choice.

Ask by Ball Chang. in the United States
Jan 22,2025

Real Tutor Solution

Tutor-Verified Answer

Answer

\( g(0) = 0 \), \( g(-5) \) does not exist, \( g(7) \) is not a real number, and \( g\left(\frac{3}{2}\right) = \dfrac{3\sqrt{91}}{91} \).

Solution

Let's evaluate the function \( g(x) = \frac{x}{\sqrt{25 - x^{2}}} \) at the points \( x = 0 \), \( x = -5 \), \( x = 7 \), and \( x = \frac{3}{2} \). We'll determine whether each value exists and, if it does, simplify the expression. --- ### 1. Find \( g(0) \) **Evaluation:** \[ g(0) = \frac{0}{\sqrt{25 - (0)^2}} = \frac{0}{\sqrt{25}} = \frac{0}{5} = 0 \] **Options:** - **A.** \( g(0) = \boxed{0} \) - B. \( g(0) \) does not exist. - C. \( g(0) \) is not a real number. **Correct Choice:** **A.** \( g(0) = \boxed{0} \) --- ### 2. Find \( g(-5) \) **Evaluation:** \[ g(-5) = \frac{-5}{\sqrt{25 - (-5)^2}} = \frac{-5}{\sqrt{25 - 25}} = \frac{-5}{\sqrt{0}} = \frac{-5}{0} \] Division by zero is undefined. **Options:** - A. \( g(-5) = \square \) \( \quad(\) Simplify your answer. Type an exact answer, using radicals as needed.) - **B.** \( g(-5) \) does not exist. - C. \( g(-5) \) is not a real number. **Correct Choice:** **B.** \( g(-5) \) does not exist. --- ### 3. Find \( g(7) \) **Evaluation:** \[ g(7) = \frac{7}{\sqrt{25 - 7^2}} = \frac{7}{\sqrt{25 - 49}} = \frac{7}{\sqrt{-24}} \] The square root of a negative number is not a real number. **Options:** - A. \( g(7) = \square \) \( \quad(\) Simplify your answer. Type an exact answer, using radicals as needed.) - B. \( g(7) \) does not exist. - **C.** \( g(7) \) is not a real number. **Correct Choice:** **C.** \( g(7) \) is not a real number. --- ### 4. Find \( g\left(\frac{3}{2}\right) \) **Evaluation:** \[ g\left(\frac{3}{2}\right) = \frac{\frac{3}{2}}{\sqrt{25 - \left(\frac{3}{2}\right)^2}} = \frac{\frac{3}{2}}{\sqrt{25 - \frac{9}{4}}} = \frac{\frac{3}{2}}{\sqrt{\frac{100}{4} - \frac{9}{4}}} = \frac{\frac{3}{2}}{\sqrt{\frac{91}{4}}} = \frac{\frac{3}{2}}{\frac{\sqrt{91}}{2}} = \frac{3}{\sqrt{91}} \] To rationalize the denominator: \[ \frac{3}{\sqrt{91}} \times \frac{\sqrt{91}}{\sqrt{91}} = \frac{3\sqrt{91}}{91} \] **Options:** - A. \( g\left(\frac{3}{2}\right) = \boxed{\dfrac{3\sqrt{91}}{91}} \) - B. \( g\left(\frac{3}{2}\right) \) does not exist. - C. \( g\left(\frac{3}{2}\right) \) is not a real number. **Correct Choice:** **A.** \( g\left(\frac{3}{2}\right) = \boxed{\dfrac{3\sqrt{91}}{91}} \) --- ### Summary of Results - \( g(0) = 0 \) - \( g(-5) \) does not exist. - \( g(7) \) is not a real number. - \( g\left(\frac{3}{2}\right) = \dfrac{3\sqrt{91}}{91} \) If you have any further questions or need more assistance with these calculations, feel free to ask!

Reviewed and approved by the UpStudy tutoring team

error msg
Explain
Simplify this solution

Bonus Knowledge

To find \( g(0) \), we substitute \( x = 0 \) into the function: \[ g(0) = \frac{0}{\sqrt{25 - 0^{2}}} = \frac{0}{\sqrt{25}} = \frac{0}{5} = 0. \] So, the answer is: A. \( g(0)=0 \). For \( g(-5) \), we substitute \( x = -5 \): \[ g(-5) = \frac{-5}{\sqrt{25 - (-5)^{2}}} = \frac{-5}{\sqrt{25 - 25}} = \frac{-5}{\sqrt{0}}. \] Since division by zero is undefined, \( g(-5) \) does not exist. Therefore, the answer is: B. \( g(-5) \) does not exist. Now, for \( g(7) \): \[ g(7) = \frac{7}{\sqrt{25 - 7^{2}}} = \frac{7}{\sqrt{25 - 49}} = \frac{7}{\sqrt{-24}}. \] Since the square root of a negative number is not a real number, the answer is: C. \( g(7) \) is not a real number. Lastly, we'll find \( g\left(\frac{3}{2}\right) \): \[ g\left(\frac{3}{2}\right) = \frac{\frac{3}{2}}{\sqrt{25 - \left(\frac{3}{2}\right)^{2}}} = \frac{\frac{3}{2}}{\sqrt{25 - \frac{9}{4}}} = \frac{\frac{3}{2}}{\sqrt{\frac{100}{4} - \frac{9}{4}}} = \frac{\frac{3}{2}}{\sqrt{\frac{91}{4}}} = \frac{\frac{3}{2}}{\frac{\sqrt{91}}{2}} = \frac{3}{\sqrt{91}}. \] So, \( g\left(\frac{3}{2}\right) = \frac{3}{\sqrt{91}} \).

Latest Pre Calculus Questions

Try Premium now!
Try Premium and ask Thoth AI unlimited math questions now!
Maybe later Go Premium
Study can be a real struggle
Why not UpStudy it?
Select your plan below
Premium

You can enjoy

Start now
  • Step-by-step explanations
  • 24/7 expert live tutors
  • Unlimited number of questions
  • No interruptions
  • Full access to Answer and Solution
  • Full Access to PDF Chat, UpStudy Chat, Browsing Chat
Basic

Totally free but limited

  • Limited Solution
Welcome to UpStudy!
Please sign in to continue the Thoth AI Chat journey
Continue with Email
Or continue with
By clicking “Sign in”, you agree to our Terms of Use & Privacy Policy