Integral hangs the physical Prime

[C.Ret]

Hi,

I also get this message and the same more complex ones. Since a few software releases, having warning messages when performing some CAS operations is a common situation.

Just wait for the "work in progress - hourglass" icon in the upper-right-corner title bar to disappear. Then pressing the ENTER key to confirm you have read the warnings and that you are aware of the situation. The result is then displayed normally but may be inaccurate as explain.

Message may differ depending on your exact CAS configuration, in particular allowed complex results in CAS Setting is really prone to a lot of literature:



Here, I suspect that these messages are due to attempt to integrate over a domain where the n-th root function is undefined (or at lest need a few extrapolation or extra job to be possible). One of the turn-around used by the HP Prime seems to be replacing n-th root functions by reciprocal exponentiation which may help in the symbolic integration process.

How and why, I have no idea.

Replacing the n-th root functions in the initial expression returns the exact same strange rewrite expression but without any warning text message.

Give it a try: \( I'=\int_{-3}^{0}\: (x^2+1)^{1/4}\cdot(x+2)^{1/5}\: \mathrm{d}x \) didn't produce any text warning message: