f(x)=x^(3)+3x^(2)+4x+bsinx+c cosx,forall...

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

(a)1

(b)2

(c)`sqrt(2)`

(d)None of these

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