3 years ago

Questi

Mathematics

1 answer:

gizmo_the_mogwai [7]3 years ago

7 0

JDJDJS did so I can see how much it is on my iPad but it’s a

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Answer:

$f^{-1}$ (x) = $\frac{x-4}{5}$

Step-by-step explanation:

let y = f(x) and rearrange making x the subject, that is

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y - 4 = 5x ( divide both sides by 5 )

$\frac{y-4}{5}$ = x

change x to $f^{-1}$ (x) and y back to x, thus

$f^{-1}$ (x) = $\frac{x-4}{5}$

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