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Answers for “为什么当函数平坦时牛顿法会失败?”

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Newton's method uses an iterative geometric procedure. Starting from an initial guess, it moves vertically to the function graph, computes the local slope, draws a tangent line, and takes that tangent's x-intercept as the next guess.

Conditions: An initial guess x must be chosen.; The function has a usable slope at the current point.; The tangent line must intersect the horizontal zero line to produce the next guess.