1.

For any real valued function satisfying f'(x)-sin(x)(f(x)-1)

Answer» For any real valued function satisfying f'(x)-sin(x)(f(x)-1)<=0 for all real x and f(0)=1,then find the range of f(x).
(A)(-infinity,1] (B)[-1,1]
(C)[1,infinity) (D)(-1,1)


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