对任意x∈R,函数f(x)的导数存在,若f'(x)<f(x)且a>0,则下列说法正确的是 A f (a )>e ^a ·f (x )B f (a )<e ^a ·f (x )C f (a )>f (0)D f (a )<f (0)

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对任意x∈R,函数f(x)的导数存在,若f'(x)<f(x)且a>0,则下列说法正确的是
A f (a )>e ^a ·f (x )
B f (a )<e ^a ·f (x )
C f (a )>f (0)
D f (a )<f (0)

f'(x)