formula with radicals

[parisse]

The CAS main task is to compute, for this reason evaluation does not necessarily return an answer that follow the conventions of one specific country. Fractional powers of integers will always evaluate to something with ^. You can convert symbolic expressions to NTHROOT with the following little function:

Code:

f(ex):=subst(ex,'^',(a,b)->surd(a,inv(b)))

Then f(x^(1/3)) will return an NTHROOT.