Answer
D: {x: x$\ne3$},
R: {y: y$\ne$0}
Work Step by Step
The function $f(x)=\frac{2}{3-x}$ is defined if the denominator 3-x$\ne0$.
$3-x\ne0$$\implies x\ne3$.
The set of all allowable inputs or the domain D= {x: x$\ne3$}.
Range is the set of all resulting values of the independent variable.
$\frac{2}{any\,real\,number}$ is not equal to 0.
So, R: {y: y$\ne$0}
