$$\text { Find the value of } \mathrm { df } ^ { - 1 } / \mathrm { dx } \text { at } x = f ( a ) \text {. }$$

question 57

Multiple Choice

$$\text { Find the value of } \mathrm { df } ^ { - 1 } / \mathrm { dx } \text { at } x = f ( a ) \text {. }$$
- $$f ( x ) = x ^ { 3 } - 6 x ^ { 2 } - 5 , x \geq 4 , a = 2$$

• A) \(- \frac { 1 } { 21 }\)
• B) \(- \frac { 1 } { 5 }\)
• C) \(- 12\)
• D) \(- \frac { 1 } { 12 }\)

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