The Function F Is One-To-One $$f ( x ) = 3 x + 7$$

question 84

Multiple Choice

The function f is one-to-one. Find its inverse.
- $$f ( x ) = 3 x + 7$$

• A) \(f ^ { - 1 } ( x ) = - \frac { x + 3 } { 7 }\)
• B) \(f ( x ) = \frac { x - 7 } { 3 }\)
• C) \(\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \frac { \mathrm { x } - 7 } { 3 }\)
• D) \(\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \frac { \mathrm { x } + 7 } { 3 }\)

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