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Kobotan [32]
3 years ago
9

What is the inverse of the function f(x) = 1/9x +2

Mathematics
1 answer:
RUDIKE [14]3 years ago
6 0

Solution

Start by substituting y for f(x). That's easier to handle.

y = (1/9)x  +  2                 Interchange the x and the y. Where you see an x put a y and where you see a y put an x.

x = (1/9)y + 2                   Subtract 2 from both sides.

(x - 2) = (1/9)y + 2 - 2

(x - 2) = (1/9)y                  Multiply both sides by 9

9(x - 2) = (1/9)y * 9  

9(x - 2) = y                   You can put the y on the left and the left over on the right.

y = 9(x - 2)                   Put f(x) back in

f(x) = 9(x - 2)                This could be the answer. You could also remove the brackets.

y = 9x - 18

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