If $A = [x : x i s a m u l t i p l e o f 3] a n d B = [x : x i s a m u l t i p l e o f 5],$ then $A - B$ is

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Solution

Finding the value of $A - B$ :
Given $A = [x : x i s a m u l t i p l e o f 3] a n d B = [x : x i s a m u l t i p l e o f 5],$
$A = [x : x i s a m u l t i p l e o f 3] A = {3, 6, 9 \dots .} B = [x : x i s a m u l t i p l e o f 5] B = {5, 10, 15 \dots .} A - (A \cap B) = (A \cap B [b a r]) A - B = [x : x i s a m u l t i p l e o f 3 b u t n o t a m u l t i p l e o f 5]$
Hence the value of $A - B i s [x : x i s a m u l t i p l e o f 3 b u t n o t a m u l t i p l e o f 5]$ .

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