Posted by **Hasane** on Thursday, March 14, 2013 at 9:43pm.

A student was asked to find the inverse of the function f(x)=3x-7.

The student began the solution with the following:

Write f(x) = 3x-7 as y = 3x-7

x= 3y-7

The student eventually got the right answer for f^(-1)(x) [inverse notation] but did not get full marks for the solution. Why not?

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