Value (mathematics) explained
In mathematics, value may refer to several, strongly related notions.
In general, a mathematical value may be any definite mathematical object. In elementary mathematics, this is most often a number – for example, a real number such as or an integer such as 42.
- The value of a variable or a constant is any number or other mathematical object assigned to it. Physical quantities have numerical values attached to units of measurement.
- The value of a mathematical expression is the object assigned to this expression when the variables and constants in it are assigned values.
- The value of a function, given the value(s) assigned to its argument(s), is the quantity assumed by the function for these argument values.[1] [2]
For example, if the function is defined by, then assigning the value 3 to its argument yields the function value 10, since .
If the variable, expression or function only assumes real values, it is called real-valued. Likewise, a complex-valued variable, expression or function only assumes complex values.
See also
Notes and References
- Web site: Value.
- Book: Meschkowski
, Herbert
. Introduction to Modern Mathematics. 1968. George G. Harrap & Co. Ltd.. 0245591095. 32.