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vlada-n [284]
3 years ago
15

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

Mathematics
1 answer:
stealth61 [152]3 years ago
3 0

set f(x) equal to y

y = 5x + 4

swap x and y

x = 5y + 4

make y the subject

x - 4 = 5y

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

replace y with f^-1(x)

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

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