(edit: I just tried it today with replacing it by adding ( ...)^{1/3} and it displays the root symbol, I could swear that it displayed to the power of 1/3 yesterday, sorry I seemed to be confused)
Hi Eric,
Thanks for the quick response. I tried \sqrt[3]{27} myself right now and it worked, I don't know why didn't try it before and still put it as an example.
However the following expressions do not work:
\sqrt[3]{v^2(v^6 * \sqrt{v^{-3}})^{\frac{2}{3}}}
or
\sqrt[3]{\frac{x^{-7}}{x^{-4}}}
Sorry for the cunfusion underneath, when I wrote "input", I meant what wolframalpha displays as "input" (root symbol and all).
Thus on the exercise sheet of the students, I display the cubic root symbol, and not "to the power of 1/3".
On the PDF of the solution sheet they have a link to wolframalpha and if they click on it, I would like them to see the same thing as on their printed exercice sheet.
If they see for example \sqrt[3]{27} (processed through LaTeX to look like a root) on their exercice sheet and 27^{1/3} on wolframalpha, they might think it's a different exercise.
