HSC Maths Ext 1 Practice Questions - HSC Mathematics Extension 1 (NSW Higher School Certificate) Exam

The inverse of f(x) = 3x - 5 is which function?

f^{-1}(x) = 3x + 5 f^{-1}(x) = (x - 5)/3 f^{-1}(x) = 5 - 3x f^{-1}(x) = (x + 5)/3

Correct Answer:

f^{-1}(x) = (x + 5)/3

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