If f(x)=x^3+3x^2+4x+ bsinx+ c cosx AA x...

If `f(x)=x^3+3x^2+4x+ bsinx+ c cosx AA x in R` is a one-one function then the value of `b^2 + c^2` is

A

`ge 1`

B

`ge 2`

C

`le 1`

D

None of these

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The correct Answer is:

C

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