A complex number can be visually represented as a pair of numbers (a, b) forming a vector on a diagram called an Argand diagram, representing the complex plane. Re is the real axis, Im is the imaginary axis, and i is the imaginary unit which satisfies i2 = â1.
Blood groups further classified as Rhâpositive or Rhânegative are called blood types. Blood is Rhâpositive if the. blood antigen labeled âDâ is present and it is Rhânegative if the âDâ antigen is absent. O+ is the most common blood type. Not all racial and ethnic groups have the same mix of these blood types. Hispanic people, for example, have a relatively high number of Oâs, while Asian people have a relatively high. number of Bâs.
There are two major ways of distinguishing between blood types. The first is the ABO blood system, where the blood type is defined as either A, B, AB or O. The second is the Rhesus (Rh) blood group system, which determines whether a blood type is negative or positive.sk your doctor for a blood typing test. If your parents have different blood types, or their blood type is unknown, you can ask your doctor to perform a simple blood typing test to find out whether your blood is positive or negative.