Absolute value of a scalar quantity

In addition to the four elementary arithmetic operations, there are some other important mathematical operations, many of which involve only one number. The magnitude, or absolute value, of a scalar quantity is a number that gives the size of the number irrespective of its sign. It is denoted by placing vertical bars before and after the symbol for the quantity. This operation means... 

---

See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ ]

---