Brief Concept |
| Euler(1707-1783) invented a symbolic way to write the statements “ y is function of x” as y=f(x) which is read as “ y is equal to f of x” . The variable x is called independent variable and the variable y is called the dependent variable. |
Definition (function) |
| A function f from a set X to a set Y is a rule or a correspondence that assigns to each element x in X a unique element y in Y. The set X is called the domain and set of corresponding elements y in Y is called the range of f. |
Notations: |
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Functions are denoted by english alphbets such as f,g,n,H,G and so on.
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