Wednesday

April 1, 2015

April 1, 2015

Posted by **Cassie** on Monday, July 27, 2009 at 3:25pm.

State the domain of the function:

f(x)(2+x)/(3-x)

Now I know the domain is

(-infinity,3) U (3, infinity)?

(-infinity,3] U [3, infinity) ?

How do I express it? do I use ] brackets or open at the infinity and closed by the 3? i know x doesn't equal 3 so how do I show this in the answer? Thank you!

- Algebra -
**mathland**, Monday, July 27, 2009 at 4:02pmIf you close at 3, then you are including 3, which will create division by zero in this case.

The variable x cannot be 3 for this rational function.

I'd say write it like this:

(-infinity,3) U (3, infinity)

The above interval notation is saying that x < 3 or x > 3.

**Answer this Question**

**Related Questions**

Algebra - I know what the answer is just not how to exopress it. Can someone ...

Algebra - I had a question on a quiz that I just finished and I wanted to know ...

Algebra - f(x)=root sign, and inside that x-2 and g(x)x-7. Which of the ...

Algebra - Given f(x)=rootsignx-2 and g(x) = x-7 what is the domain of the ...

Algebra - Given f(x)=rootsignx-2 and g(x) = x-7 what is the domain of the ...

Algebra - Given f(x)=rootsignx-2 and g(x) = x-7 what is the domain of the ...

Algebra - Given f(x)=rootsignx-2 and g(x) = x-7 what is the domain of the ...

Algebra - Given f(x) = x - 2 and , which of the following is the domain of the...

Algebra - Could you please check my answers and help me with one? Find the ...

Algebra - What is the answer? I came up with C. is this correct? Thanks for the ...