Can someone explain the difference please???

What is the difference between ∪ and ∩?!?! I don't understand...

Question

Can someone explain the difference please???

What is the difference between ∪ and ∩?!?! I don't understand...

alyssajobug · Answer

So, ∪ is union and ∩ is intersection then?

hartnn · Answer

taking an example 

A = {a,b,c,d}, B = {b,d,f,h}
∩ is INTERSECTION = common elements
A∩B = {b,d}

U mean UNION = elements present in all sets (all elements considered only once)
AUB = {a,b,c,d,f,h}

makes sense ?

alyssajobug · Answer

This is intersection then right?

hartnn · Answer

intersection of what ?

alyssajobug · Answer

No, then its would be union then?

alyssajobug · Answer

This is my question, I dont quite understand the difference between the answers tho...

hartnn · Answer

OR  = UNION
AND = INTERSECTION

hartnn · Answer

since OR = U = UNION, its either 1st or 3rd
so, x-2 <1 
clearly gives x <3

alyssajobug · Answer

Ok, I think I get it now... Thanks @hartnn