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R 语言 二分法与 牛顿迭代法计算中方程的根
2022-07-29 10:23:00 【Mrrunsen】
Newton-Raphson方法是一种基于根的初始值猜测而来的迭代方法,此方法使用的函数为原函数以及原函数的导数,如果成功,它通常会快速的收敛,但是它也有可能像其他寻根方法一样失败,这是需要注意的一点。(因为牛顿方法并不总是趋同,其收敛理论作用于局部收敛)
计算以下方程的根
e x + c o s x + x = 0 e^x + cosx + x = 0 e
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