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anonymous
 4 years ago
I'm trying to prove A ∩ B ∩ C ⊆ A ∩ B but am stuck after this:
Let x ∈ A ∩ B ∩ C
1. Therefore, x ∈ A and x ∈ B and x ∈ C
anonymous
 4 years ago
I'm trying to prove A ∩ B ∩ C ⊆ A ∩ B but am stuck after this: Let x ∈ A ∩ B ∩ C 1. Therefore, x ∈ A and x ∈ B and x ∈ C

This Question is Closed

JamesJ
 4 years ago
Best ResponseYou've already chosen the best response.4..hence it is true that x ∈ A and x ∈ B. Therefore, x ∈ A ∩ B

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Thanks JamesJ, that's along the lines of what I thinking, but it seemed too...simple an explanation at the time. I need to practice this type of problem more.

JamesJ
 4 years ago
Best ResponseYou've already chosen the best response.4The basic logical principle here is this. If X and Y are statements, then X and Y ==> X In other words, if you know two things are true, then each of their components is also true.
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