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

question 414

Multiple Choice

$$\text { Find the value of } \mathrm { df } ^ { - 1 } / \mathrm { dx } \text { at } x = f ( a ) \text {. }$$
- $$f ( x ) = 5 x ^ { 2 } , x \geq 0 , a = 3$$

• A) 30
• B) \(\frac { 1 } { 30 }\)
• C) \(\frac { 1 } { 45 }\)
• D) \(\frac { 1 } { 10 }\)

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