Quandaries and Queries 

I understand that the square root is defined to be positive only. Does the same rule apply to other evennumbered roots, such as the 4th root, or the 6th root, etc.? Hi, Take a look at the answer that we gave to Frank who asked a similar question. The answer for evennumbered roots is the same as we noted there. If you asked me for the fourth root of 16 I would say it is 2 although some older books might give 2 and 2. If you are using the surd notation then the answer is 2. 

