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急设f(x)满足f''(x)+f'(x)^2=x,且f'(0)=0,则点(0,f(0))必为拐点.
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急 设f(x)满足f''(x)+【f'(x)】^2=x,且f'(0)=0,则点(0,f(0))必为拐点.
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f''(x)+【f'(x)】^2=x,且f'(0)=0
x=0代入上式,因为f'(0)=0得f''(0)=0
所以根据拐点定义,(0,f(0))必为拐点(x=0处一阶导数二阶导数都为0)
x=0代入上式,因为f'(0)=0得f''(0)=0
所以根据拐点定义,(0,f(0))必为拐点(x=0处一阶导数二阶导数都为0)
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