Prove the following parts of Theorem 2.2.1: For all sets A , B and C A ∩ A = A
Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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Sec 2.2 Question 7e)
Prove the following parts of Theorem 2.2.1: For all sets A , B and C
A ∩ A = A,
[ By part (b) of this theorem, A ∩ A ⊆ A. Next, let x ∈ A and prove x ∈ A ∩ B to prove A ⊆ A ∩ A]
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