The Function F Is One-To-One $$f ( x ) = 7 x ^ { 2 } - 8 , x \geq 0$$

question 281

Multiple Choice

The function f is one-to-one. Find its inverse.
- $$f ( x ) = 7 x ^ { 2 } - 8 , x \geq 0$$

• A) \(f ^ { - 1 } ( x ) = \sqrt { \frac { 7 } { x + 8 } }\)
• B) \(f ^ { - 1 } ( x ) = \frac { 7 } { \sqrt { x } + 8 }\)
• C) \(\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \sqrt { \frac { \mathrm { x } + 8 } { 7 } }\)
• D) \(\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = - \sqrt { \frac { \mathrm { x } + 8 } { 7 } }\)

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Definitions:

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