Is it possible to put the imaginary unit (i^2= -1) under a square root or in a denominator? Also, what algebraical functions are possible under such conditions?
I am sorry for asking a question that is probably simple, but in my school we have just begun with the imaginary unit, and there are simply no such informations in my book, nor have I been able to find it on the internet. (Perhaps the problem is that English is not my first language.)