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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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9
Task/Nth-root/Common-Lisp/nth-root-1.lisp Normal file
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(defun nth-root (n a &optional (epsilon .0001) (guess (1- n)))
(assert (and (> n 1) (> a 0)))
(flet ((next (x)
(/ (+ (* (1- n) x)
(/ a (expt x (1- n))))
n)))
(do* ((xi guess xi+1)
(xi+1 (next xi) (next xi)))
((< (abs (- xi+1 xi)) epsilon) xi+1))))

4
Task/Nth-root/Common-Lisp/nth-root-2.lisp Normal file
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(let* ((r (nth-root 3 10))
(rf (coerce r 'float)))
(print (* r r r ))
(print (* rf rf rf)))