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.
Rational Exponents. The nth root of a number can be expressed by using radical notation or the exponent. 1 1n. For example, 8 3 and 3 8 both represent the cube root of 8, and we have. 81 3 3 8 2. Later in this section we will see that using exponent 1 n for nth root is compat-. ible with the rules for integral exponents that we already know. EXAMPLE 1 Radicals or exponents.