设函数f(x)在点x=0处二阶可导,且满足limx→0(f(x)x2+1?cos2xx3)=3.求f(0),f′(0)与f″(0)

设函数f(x)在点x=0处二阶可导,且满足limx→0(f(x)x2+1?cos2xx3)=3.求f(0),f′(0)与f″(0).

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