FunctionHard
Question
If f(x) = 3x - 5, then f-1(x)
Options
A.is given by 
B.is given by 
C.oes not exist because f is not one-one
D.oes not exist because f is not onto
Solution
Given f(x) = 3x - 5 (given)
Let y = f(x) = 3x - 5 ⇒ y + 5 = 3x
⇒
f-1 (y) =
⇒ f-1 (x) = 
Let y = f(x) = 3x - 5 ⇒ y + 5 = 3x
⇒
f-1 (y) =
⇒ f-1 (x) = Create a free account to view solution
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