If \( f(x)=\frac{\sin \{x\}-\{x\}}{\left(x^{2}+b x+c\right)^{3}}(\{\cdot\} \) is fractional part...
If \( f(x)=\frac{\sin \{x\}-\{x\}}{\left(x^{2}+b x+c\right)^{3}}(\{\cdot\} \) is fractional part of \( x) \) and \( f\left(1^{+}\right) \), \( f\left(2^{+}\right) \)are non-zero finite number then \( 2 c+b \)
(a) 0
(b) 1
(c) -1
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