假设 1)函数f(x)定义于闭区间[x 0 ,x n ]上,并有(n-1)阶连续导数f (n-1) (x); 2)f(x)在(x 0 ,x n )上有n阶导数; 3)满足等式f(x 0 )=f(x 1 )=…=f(x n )(x 0 <x 1 <…<x n ). 证明在区间(x 0 ,x n )上至少存在一点ξ使得f (n) (ξ)=0.
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【单选题】Three friends decided to sail around the world in a small yacht(游艇). They loaded it with food and water and set off. They traveled to many beautiful places, and were having a wonderful time. Until one...