SOLUTION: Let the function f be defined by the equation y = f(x), where x and f(x) are real numbers. Find the domain of the function. f(x)= sqrt of x^2-64 (the sqrt is of the x^2-

Question 389281: Let the function f be defined by the equation y = f(x), where x and f(x) are real numbers. Find the domain of the function.
f(x)= sqrt of x^2-64

(the sqrt is of the x^2-64 not just the x^2)
Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website!
We have

For the function to be defined on the real numbers, the square root expression must be nonnegative. Therefore,

or
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