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【简答题】
设f：[a，b]→ 在[a，b]上具有连续导数， 是f(x)在(a，b),内的重数为1的孤立零点．证明生成迭代序列 的映射在 的某邻域内为压缩映射，其中x 0 ∈(a，b)，x n =x n-1 -f(x n-1 )/f'(x n-1 )．
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