The greatest value of f(x)=cos(x e^([x])...

The greatest value of `f(x)=cos(x e^([x])+7x^2-3x),x in [-1,oo],` is (where [.] represents the greatest integer function). `-1` (b) 1 (c) 0 (d) none of these

A

-1

B

1

C

0

D

none of these

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Verified by Experts

The correct Answer is:

2

Since cos `theta le1 forall theta f(x) le 1 forall x`

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