Question

Determine the domain of the function. f(x) is equal to four divided by x squared.
A. x ≥ 0
B. All real numbers except 0
C. All real numbers except 3
D. All real numbers

Answer 1

f(x)  = 4/x^2

Think what values of x give real values of f(x)

negative numbers are Ok  andso are positive ones 

What about x = 0? What is the value of 4 / (0)^2  ?