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Burka [1]
3 years ago
10

If f(x) = 5x + 4, which of the following is the inverse of Ax)?

Mathematics
1 answer:
Levart [38]3 years ago
6 0

Answer:

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

Step-by-step explanation:

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

y = 5x + 4 ( subtract 4 from both sides )

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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