Wednesday

October 1, 2014

October 1, 2014

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 ...

Math - Find the requested function and state its domain: f(x)= 4x+3 g(x)=4x-5 ...

Math - Find the requested function and state its domain: f(x)= 4x+3 g(x)=4x-5 ...

college algebra - 1.for the given function f&g, find the following and state the...

calcius - Determine whether the relation represents a function. If it is a ...

college algebra - for the given function f&g, find the following and state the ...

college algebra - For the given functions f and g find the following and state ...

Calculus - Explain, using the theorems, why the function is continuous at every ...

Algebra (Last Question) - I have - to graph each relation - decide if it is a ...

Function Notation - Ive been shown that a function can be written like so f:X-&...