Function
 

Function:
It is a relationship between two sets, one is called Independent While other is called Dependent set.
?: A?B
e.g.:
y = ? (x) = x2
If we put the Value of x then
When x = 1
y = ? (1) = 12 = 1
When x = 2
y = ? (2) = 22 = 4
When x = 3
y = ? (3) = 32 = 9
When x = 4
y = ? (4) = 42 = 16
When x = a
y = ? (a) = a2
f : X → Y
X = {1, 2, 3, 4, a}
Y = {1, 4, 9, 16, a2}
Domain:
The independent set of function is called Domain
X is the Domain of f because x is independent
Range:
The dependent set of function is called Range
Y is the Range of f because y is dependent

Some Points to Remember:

• One Element of Domain should not have Two Images
• Every element of Domain should have an Image
• Two elements may have a Single Image.

Difference Between Range & Co domain:

Assalam-o-Alaikum!

Thanks yaar! Chalo is se mera thoda domain or range ka concept to clear hua. Laikin ab kia faida... Mid term to hogia. Chalo knoledge main izafa hogia Alhamdolillah. Thanks again.