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.
For example, 4 and â4 are square roots of 16 because 42 = (â4)2 = 16. Every non-negative real number a has a unique non-negative square root, called the principal square root, which is denoted by âa, where â is called the radical sign or radix. For example, the principal square root of 9 is 3, denoted â9 = 3, because 32 = 3 Ã 3 = 9 and 3 is non-negative. The term whose root is being considered is known as the radicand. The radicand is the number or expression underneath the radical sign, in this example 9. Every positive number a has two square roots: âa, which is positive, and ââa, which is negative.