Finding the Domain of a Function

megacat8921 · Dec 16, 2015

How do you find the Domain of \sqrt{(x^2 + 4)/(x^2 - 4)} ?

Prove It · Dec 16, 2015

megacat8921 said:

How do you find the Domain of \sqrt{(x^2 + 4)/(x^2 - 4)} ?

What restrictions are implied by a square root? What restrictions are implied by a fraction?

megacat8921 · Dec 17, 2015

Prove It said:

What restrictions are implied by a square root? What restrictions are implied by a fraction?

There cannot be a negative number under the square root and a fraction cannot have zero as a denominator. Knowing that, I still cannot figure out what steps to take to figure the problem out.

Prove It · Dec 17, 2015

megacat8921 said:

There cannot be a negative number under the square root and a fraction cannot have zero as a denominator. Knowing that, I still cannot figure out what steps to take to figure the problem out.

That's EXACTLY what you need!

What values of x will give a zero denominator?

What values of x will give something negative under the square root?

Finding the Domain of a Function

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Finding the Domain of a Function

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