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The number of nonzero integral values of...

The number of nonzero integral values of `a` for which the function `f(x)=x^4+a x^3+(3x^2)/2+1` is concave upward along the entire real line is___________

A

`a in [0,oo)`

B

`a in (-2, 2)`

C

`a in [-2, 2]`

D

`a in (0, oo)`

Text Solution

Verified by Experts

The correct Answer is:
B
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