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Let x = 2 be a local minima of the function f ( x ) = 2 x 4 – 18 x 2 + 8 x + 12, x   − 4, 4 ) . If M is local maximum value of the function f in ( – 4, 4), then M =

1. 2 33 6 12 
2. 2 31 6 12 
3. 2 31 6 18 
4. 2 33 6 18 

Correct answer: 2 33 6 12 

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