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September 21, 2014

September 21, 2014

Posted by **Greg** on Wednesday, April 18, 2012 at 10:43pm.

f(x) = 3x + 12

I don't think I worked this problem off correctly...I am suppose to find the inverse of the function

Is this the correct way to work this problem?

y= 3x + 12

x= 3y + 12

3y = x - 12

f-1(x) = x - 12/3

- Algebra 2 -
**Anna**, Wednesday, April 18, 2012 at 11:30pmYou would divide everything by 3 leaving you with f-1(x)= x/3 - 4

- Algebra 2 -
**ashwni kumar**, Thursday, April 19, 2012 at 8:15amsee the correct and easy way is like this :

y=3x +12

now get x in terms of y

3x =y-12

or x= (y-12)/3

now replace x with y and vice versa

so you will get :

y= (x-12)/3

or f-1(x)= x/3 - 4

this should be the answer

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