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Functions-An introduction


#1

The concept of function is very simple.
supposeIi say that:

  y=5x²  

where x∈R. this tells that y depends upon x this can be stated that y is a function of x. or

y=f(x)

we can also say that x=3√y here x depends on y or x is a function of y or

x=f(y)

so it can be stated that a function is an operator which has an input and gives an output.The input value is called independent variable while output value is called dependent variable


#2

for full article on functions, you can refer to my article on my blog
http://ibelitetutor.com/blog