Determine Whether the Given Function Is One-To-One $$f ( x ) = \frac { 4 } { x + 5 }$$

question 40

Multiple Choice

Determine whether the given function is one-to-one. If so, find a formula for the inverse.
- $$f ( x ) = \frac { 4 } { x + 5 }$$

• A) \(f ^ { - 1 } ( x ) = \frac { - 5 x + 4 } { x }\)
• B) \(f ^ { - 1 } ( x ) = \frac { 5 + 4 x } { x }\)
• C) Not a one-to-one function
• D) \(f ^ { - 1 } ( x ) = \frac { x } { 5 + 4 x }\)

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