i use wolfram alpha to find domain of f(x) = x^(1/3). The result is x>= 0.
I don't know why can't be negative number.
i try to use some negative number such as x = -27, the result is -3.
Have any one can explained me to more clearly?
Surd returns what you expect, W|A. See also the documentation for Surd.
Surd
Thank you so much for the help.
Attachments:
