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Pachacha [2.7K]
3 years ago
15

What is the inverse of f(x) =1/3 x + 2?

Mathematics
1 answer:
Luba_88 [7]3 years ago
3 0

Answer:

Step-by-step explanation:

To begin, we will replace f(x) with y, since they mean the same thing, except y does not represent function notation.  We will put it back when we're done.

y=\frac{1}{3}x+2

The rules for finding an inverse function algebraically is to switch the x and the y, then solve for the new y.  Our function then becomes, with the variables switched:

x=\frac{1}{3}y+2

Begin to isolate the new y by subtracting 2 from both sides:

x-2=\frac{1}{3}y

Now multiply both sides by 3:

3(x - 2) = y and

3x - 6 = y

That's the inverse, so now we will put it back into function notation:

f^{-1}(x)=3x-6

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