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设f(x)在[a,b]上连续,a
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【中值定理证明题】设函数f(x)在[a,b]上连续,在(a,b)上可导,且f(a)f(b)>0,f(a)f((a+b)/
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设函数f(x)在[a,b]上连续,在(a,b)内有二阶导数,且有f(a)=f(b)=0,f(c)>0(a
设f(x)在[a,b]上连续,在(a,b)内二阶可导,且f(a)f(b)<0,f'(c)=0.a