Question

find the domain and range of the following rational function. use any notation
1. f(x)=2/x+1
2. f(x)= 3x/x+3
3. f(x)= 3-x/x-7
4. f(x)= 2+x/x
5. f(x)= (x+1)/x^2-1
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Answer 1

Answer:

For example, the equation "x+2" could be shown as "f(x) = x+2," with "f(x)" standing for the function that it is set equal to. In order to find the domain of a function, you'll need to list all the possible numbers that would satisfy the function, or all the "x" values. Rewrite the equation, replacing f(x) with y.