Algebra

Find the domain of the function. Write in interval notation.
sqrt(x^2 − 64).

For the answer, I got (-infinity, -8)u(8, infinity), but that's wrong, and I'm not sure what else to try?

  1. 👍 0
  2. 👎 0
  3. 👁 74
asked by kelly
  1. if you allow taking imaginary roots, then the domain is -inf to +inf.

    If you allow only real roots, then must be less than -8 or greater than 8, your answer.

    consider x=3
    sqrt(9-64)=sqrt(-55)=i*sqrt55

Respond to this Question

First Name

Your Response

Similar Questions

  1. Algebra

    Find the domain of the function. (Write your answer using interval notation.) sqrt(x)/ (4x^2 + 3x − 1) If you set the bottom equal to zero, I got that x can't be -1 or 1/4. But I'm not sure if that's right, or how to write the

    asked by kelly on September 12, 2015
  2. math (3)

    Find the domain of the function. Write your answer in interval notation. (If you need to enter ∞ or -∞, type INFINITY or -INFINITY.) f(s,t)= sqrt(s^2+t^2) s = ? t = ?

    asked by Mia on April 29, 2014
  3. Math

    Find the domain of the function. Write your answer in interval notation. (If you need to enter ∞ or -∞, type INFINITY or -INFINITY.) h(u,v) = sqrt(4-u^2-v^2) u^2+v^2 = ?

    asked by Mia on April 29, 2014
  4. math (4)

    Find the domain of the function. Write your answer in interval notation. (If you need to enter ∞ or -∞, type INFINITY or -INFINITY.) h(u,v) = sqrt(4-u^2-v^2) u^2+v^2 = ?

    asked by Mia on April 28, 2014
  5. math (3)

    Find the domain of the function. Write your answer in interval notation. (If you need to enter ∞ or -∞, type INFINITY or -INFINITY.) f(s,t)= sqrt(s^2+t^2) s = ? t = ?

    asked by Mia on April 28, 2014
  6. Function Domain

    Giving your answer in interval notation, find the domain of the function sqrt(((x+4)(x−4))/((x−7)(x−5)))

    asked by Daniel on February 9, 2018
  7. Pre-Cal: Domain

    [Note: I really need help on these Domain questions. I've been struggling with this all day] -Consider the following: f(x)= 5/x , g(x)= 7/(x+7) -Find the solutions to the following: 1). (f+g)(x) 2). Domain of (f+g)(x) [Use

    asked by Ashley on June 9, 2016
  8. calculus

    find the domain of the following function. State your answer in interval notation. f(x) = 5x + 10/ x + sqrt -26x - 169

    asked by amy on November 27, 2011
  9. MATH

    Let f(x)=SQRT X+1 and g(x)=3x−5. Find f∘g and g∘f, and their respective domains. What is the domain of f∘g ? Answer (in interval notation): 3. (g∘f)(x)= 4. What is the domain of g∘f ? Answer (in interval notation):

    asked by lyla on March 1, 2016
  10. Calc 1

    Consider the function below. f(x) = (x^2)/(x−9)^2 (a) Find the vertical and horizontal asymptotes. x=? y=? (b) Find the interval where the function is increasing. (Enter your answer using interval notation.) Find the interval

    asked by TayB on April 24, 2015

More Similar Questions