Set

 

a in A b notin A : https://goo.gl/754egJ YouTube : https://youtu.be/5uWHTrvHL0Q

A subset B : https://goo.gl/HyKDww YouTube : https://youtu.be/IOHDOgiQG5s

A = B : https://goo.gl/itetnB YouTube : https://youtu.be/lWz7u_TVznE 

Set and Element :  https://goo.gl/AfCfYB YouTube : https://youtu.be/LCJcyKJwfKQ

Union Intersection Relative Complement(Difference) Universal Set Absolute Complement(Complement) : https://goo.gl/iYsVwv  YouTube : https://youtu.be/px3qG6opK-Y

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