Rj is playing with a spring by throwing ...

Rj is playing with a spring by throwing if in the air which is moving along the function:
`f(x)=3x^4-12x^2+5`.

Find the critical points of x which it touches the x-axis :

A

0,1,2

B

0,-1,2

C

0,1,-2

D

1,2,-2

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The correct Answer is:

B

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