# Math Help - Help with two functions...

1. ## Help with two functions...

f(x)= x/2-x and g(x)=1/x

domain f o g

Any help with this question would be much appreciated. Thank you!

2. ## Re: Help with two functions...

Originally Posted by curt26
f(x)= x/2-x and g(x)=1/x

domain f o g

Any help with this question would be much appreciated. Thank you!
Is the question is asking for the domain of $fg$?

If so, then the answer is the domain of the function g(x) which has to be provided in the question.

3. ## Re: Help with two functions...

Originally Posted by curt26
f(x)= x/2-x and g(x)=1/x

domain f o g

Any help with this question would be much appreciated. Thank you!
$f \circ g=f(g(x))=\frac{\frac{1}{x}}{2-\frac{1}{x}}=\frac{1}{2x-1}$

Domain : $\forall x \in \mathbb{R} ~\text{except}~ x=\frac{1}{2} ~\text{and}~x=0$

4. ## Re: Help with two functions...

x/2-x or x/(2-x) ?