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suppose you have to prove  a property , then some two sets have to be shown equal.

 So you can do it this way.

Assume x to be an element of the set on the left hand side and prove that x belongs to the set on the right hand side.Prove the reverse as well.

 This will be the method for proving.

 If you have any specific question you can send it to us and we will help you in that.