设f(x)二阶连续可导,且=0,f”(0)=4,则=_____________.

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问题 设f(x)二阶连续可导,且=0,f”(0)=4,则=_____________.

选项

答案e2

解析=0得f(0)=0,f’(0)=0,则

f”(0)=2,所以=e2
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