C-09-Q130mediumsingle_mcqDomain of f(x)=∣x∣f(x) = |x|f(x)=∣x∣ is:a(0,∞)(0, \infty)(0,∞)b[0,∞)[0, \infty)[0,∞)cRRRdR−{0}R - \{0\}R−{0}