Some people are wrong ways to prove that set is equal to set . I also experienced it when I started learning math. Though the concept of set is equal to set very simple. We only have to prove that set is a subset of set and set is a subset of set . Of course the basic is very easy to understand.
Then, how to prove the set is a subset of the set , vice versa?
The way to prove set is a subset of set is by taking any element on set and then prove that element is a element of set . It can be easily understood that the taking of any element can be representative of all element of the set. Mathematically like this :
Example : (more…)