fractional exponents error: "negative number to a fractional power not real"
Hi. I'm having a problem with fractional exponents and higher order roots in sage.
If I put (-2)** (6/2), sqrt((-2)** 6)
, the result is (-8, 8)
. That's wrong, since sqrt[ (-2)**6 ] = (-2) * (-2) * (-2) = -8
. Does anyone know why this is happening, please?
I need to plot a function like V(x) = x^[ (2n+1)/n ]
, where n is interger. However, sage returns the error 'negative number to a fractional power not real' and plot only the positive branch.