SICP学习笔记 1.1.7 实例:使用牛顿法求平方根

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? ?练习1.6

? ? 应用序会对

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3))??
(define?(cube-root-iter?oguess?nguess?x)??
??(if?(good-enough?oguess?nguess)??
??????nguess??
??????(cube-root-iter?nguess?(cube-improve?nguess?x)?x)))??
(define?(cube-root?x)???