NCERT Class XI Mathematics - Sets - Solutions
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Question : 62
Total: 73
Show that if A ⊂ B, then C – B ⊂ C – A.
Solution:
Let x ∈ C – B ⇒ x ∈ C and x ∉ B
⇒ x ∈ C and x ∉ A [Since A ⊂ B]
⇒ x ∈ C – A
Hence C – B ⊂ C – A
⇒ x ∈ C and x ∉ A [Since A ⊂ B]
⇒ x ∈ C – A
Hence C – B ⊂ C – A
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