What is domain of function f(x) = x^-1 for it to be defined everywhere on domain?(a) (2, ∞)(b) (-∞, ∞) – {0}(c) [0, ∞)(d) None of the mentionedThe question was asked in an interview.Query is from Domain and Range of Functions topic in division Basic Structures: Sets, Functions, Sequences, Sums and Matrices of Discrete Mathematics

What is domain of function f(x) = x^-1 for it to be defined everywhere

1.	What is domain of function f(x) = x^-1 for it to be defined everywhere on domain?(a) (2, ∞)(b) (-∞, ∞) – {0}(c) [0, ∞)(d) None of the mentionedThe question was asked in an interview.Query is from Domain and Range of Functions topic in division Basic Structures: Sets, Functions, Sequences, Sums and Matrices of Discrete Mathematics
Answer» The CORRECT option is (B) (-∞, ∞) – {0} The explanation is: FUNCTION x^-1 is not defined for x=0, otherwise it defined for every real number.

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