Question

Which of the following correctly describes the domain of the function shown below?
r(x)=(x^2-1)/(2x

Answer 1

A) {x: all real numbers}
B) {x: neq 0}
C) {x: neq 1}
D) {x: X neq +/- 1}

Answer 2

B
bcoz at x=0 function doesn't exist