Find the domain of the function.f(x) = 
A. {x|x ? 19}, or [19, ?)
B. all real numbers, or (-?, ?)
C. {x|x ? -19}, or [-19, ?)
D. {x|x ? 19}, or (-?, 19) ? (19, ?)
Answer: C
Mathematics
A. {x|x ? 19}, or [19, ?)
B. all real numbers, or (-?, ?)
C. {x|x ? -19}, or [-19, ?)
D. {x|x ? 19}, or (-?, 19) ? (19, ?)
Answer: C