Find a Formula for the Inverse of the Function Described $C$

question 512

Multiple Choice

Find a formula for the inverse of the function described below.
-A size 4 dress in Country $C$ is size 42 in Country D. A function that converts dress sizes in Country $C$ to those in Country $D$ is $f ( x ) = x + 38$ .

• A) \(f ^ { - 1 } ( x ) = x - 38\)
• B) \(f ^ { - 1 } ( x ) = \frac { x } { - 38 }\)
• C) \(\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \mathrm { x } + 38\)
• D) \(f ^ { - 1 } ( x ) = \frac { x } { 38 }\)

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