Interventional radiology. Interventional radiology (IR), sometimes known as vascular and interventional radiology (VIR), is a medical sub-specialty which provides minimally invasive image-guided diagnosis and treatment of disease.
Report Abuse. 3*(2)^(1/3) In words, 3 times the third root of 2. Divide 54 by 27 (which is 3 cubed), giving 2 inside the radical and 3 outside.... ... Â· 5 years ago.*(2)^(1/3) In words, 3 times the third root of 2. Divide 54 by 27 (which is 3 cubed), giving 2 inside the radical and 3 outside. ... ... Â· 5 years ago.
To indicate some root other than a square root, you use the same radical symbol, but you insert a number into the radical, tucking it into the check mark part. For instance: The  3  in the above is the index of the radical; the  64  is the argument of the radical, also called the radicand.Since most radicals you see are square roots, the index is not included on square roots. While   would be technically correct, I've never seen it used.o indicate some root other than a square root, you use the same radical symbol, but you insert a number into the radical, tucking it into the check mark part. For instance: The  3  in the above is the index of the radical; the  64  is the argument of the radical, also called the radicand.