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Answers for “如果函数在当前猜测处是平坦的会发生什么?”

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The mathematical iteration formula for Newton's method is xn+1=xn−f(xn)f′(xn)x_{n+1} = x_n - \frac{f(x_n)}{f'(x_n)}. This formula updates the current guess xnx_n to the next guess xn+1x_{n+1} by subtracting the ratio of the function value to its derivative.

Conditions: f′(xn)f'(x_n) must be available and nonzero for the displayed division.; The formula gives one iterative update from xnx_n to xn+1x_{n+1}.