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If f is a function defined from R to R, is given by f(x) = 3x – 5 then f ^–1(x)is given by __________(a) 1/(3x-5)(b) (x+5)/3(c) does not exist since it is not a bijection(d) none of the mentionedThe question was asked during an interview.Enquiry is from Inverse of a Function in section Basic Structures: Sets, Functions, Sequences, Sums and Matrices of Discrete Mathematics

Answer»

Correct CHOICE is (B) (x+5)/3

Explanation: y = 3x-5, x = (y+5)/3, F ^-1(x) = (x+5)/3.



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