#| BEGIN (Введите свое решение) |#
(define (square x) (* x x))
(define (averageQube x y)
  (/ (+ (/ x (square y)) 
        (* y 2) )
     3))
(define (improve guess x) (averageQube x guess))
(define (good-enough? guess x)
  (< (abs (- (improve guess x) guess)) 0.00001))
(define (cube-iter guess x)
  (if (good-enough? guess x)
      guess
      (cube-iter (improve guess x)
                 x)))
(define (cube-root x)
  (cube-iter 1.0 x))
#| END |#