Opposite of absolute value function (1 Viewer)

[bluboy22]

What is the opposite of,

f(x) = -3 l x - 6 l + 2

 

[xFusion]

By opposite do you mean inverse?
If inverse, then you just exchange the x's and y's, then rearrange to make y the subject. i.e.
f(x) = -3 l x - 6 l + 2
x= -3 ly - 6 l +2
x = -3(y-6) +2
x=-3y +20
y=(20-x)/3 ---> f(x) = (20-x)/3
The other answer
f(x) = -3 l x - 6 l + 2
x= -3 ly - 6 l +2
x = 3(y-6) +2
x = 3y -16
y = (x+16)/3 ---> f(x) = (x+16)/3

 

[Divided_By_Zero]

You're over thinking it, i thought he didn't want the inverse, just the signs reversed inside the absolute value lines.

 

[Top Secret]

By opposite do you mean inverse?
If inverse, then you just exchange the x's and y's, then rearrange to make y the subject. i.e.
f(x) = -3 l x - 6 l + 2
x= -3 ly - 6 l +2
x = -3(y-6) +2
x=-3y +20
y=(20-x)/3 ---> f(x) = (20-x)/3
The other answer
f(x) = -3 l x - 6 l + 2
x= -3 ly - 6 l +2
x = 3(y-6) +2
x = 3y -16
y = (x+16)/3 ---> f(x) = (x+16)/3

Hey, take note that this was posted in the general maths section. lol

 

[Divided_By_Zero]

Soon as i hit 4U in Yr12 my maths elitism is going through the roof

 

[xFusion]

You're over thinking it, i thought he didn't want the inverse, just the signs reversed inside the absolute value lines.

lol I didn't think of this. I was thinking this question was abit hard for general

 

[Divided_By_Zero]

lol I didn't think of this. I was thinking this question was abit hard for general

Haha

well maybe he meant to ask it somewhere else?

 

[PC]

I think some people don't realise there's a specific "General Mathematics" course, and might mistake this section as a place for general enquiries ... if you know what I mean.