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SETS — MATHS STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceMATHSSETS1 Mark
Question
Show that if $A \subset B$then$C - B \subset C - A.$
✓

Answer

Let$x \in C - B \Rightarrow x \in C$and $x \notin B$
$\Rightarrow x \in C$and$x \notin A$$[\because A \subset B]$
$\Rightarrow x \in C - A$Hence$C - B \subset C - A.$

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