Tiago Katcipis wrote: > im not understanding why is this a problem...i have this simple function > > def newton_divergente(x): > return math.pow(x, 1.0/3.0) > > but when x = -20 it returns this error > > return math.pow(x, 1.0/3.0) > ValueError: math domain error > > but why is that? is it impossible to calculate -20 ^ (1/3) ? > > here on my calculator i get the result -6,666666667, but python seens to > dont now the answer, why? am i doing something wrong? =/
Your calculator is not doing so well either since In [15]: -6.666666667**3 Out[15]: -296.29629634074081 but this seems to work: In [13]: -20**(1./3.) Out[13]: -2.7144176165949063 Kent _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
