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Jlenok [28]
3 years ago
6

Which function is the inverse of Rx) = 8x + 4?

Mathematics
2 answers:
Westkost [7]3 years ago
7 0

Answer:

D

Step-by-step explanation:

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

y = 8x + 4 ( subtract 4 from both sides )

y - 4 = 8x ( divide both sides by 8 )

\frac{y-4}{8} = x

Change y back into terms of x with x = f^{-1} (x)

f^{-1} (x) = \frac{x-4}{8} → D

babunello [35]3 years ago
5 0

Answer:

B.~f^{-1}(x)=\frac{x-4}{8}

Step-by-step explanation:

To find the inverse of a function, swap the places of the x and y variables and solve for y again.

x=8y+4\\x-4=8y\\\frac{x-4}{8}=y

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