19 lines
382 B
Scheme
19 lines
382 B
Scheme
|
#| BEGIN (Write your solution here) |#
|
||
|
|
(define (improve guess x)
|
||
|
|
(/ (+ (/ x guess guess)
|
||
|
|
(* 2 guess))
|
||
|
|
3))
|
||
|
|
|
||
|
|
(define (good-enough? guess x)
|
||
|
|
(< (abs (- (improve guess x) guess)) 0.0001))
|
||
|
|
|
||
|
|
(define (cbrt-iter guess x)
|
||
|
|
(if (good-enough? guess x)
|
||
|
|
guess
|
||
|
|
(cbrt-iter (improve guess x)
|
||
|
|
x)))
|
||
|
|
|
||
|
|
(define (cube-root x)
|
||
|
|
(cbrt-iter 1.0 x))
|
||
|
|
#| END |#
|