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All the possible values of the paramter ...

All the possible values of the paramter 'a' so that the function ,`f(x) =x^3-3(7-a)x^2-3(9-a^2)x+2,` has a negative point of local minimum

A

`alt29/7`

B

`agt7`

C

`agt0`

D

No real value of 'a'

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The correct Answer is:
A
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