ABSTRACT
In an equation such as y D 3x2 C2x5, y is said to be a function of x and may be written as y D fx.
An equation written in the form fx D 3x2 C 2x 5 is termed functional notation. The value of fx when x D 0 is denoted by f0, and the value of fx when x D 2 is denoted by f2 and so on. Thus when fx D 3x2 C 2x 5, then
f0 D 302 C 20 5 D 5 and f2 D 322 C 22 5 D 11 and so on.
