Question

if a and b be two sets in the universal set , then (a-b) equals ?

Answer 1

answer- (u-b)

explanation- Taking example

let u={1,2,3,4,5}

a={1,2,3}

b={3,4,5}

(a-b)={1,2,3}-{3,4,5}={1,2}

b'coz (a-b) means element of a not in b

(u-b)={1,2,3,4,5}-{3,4,5}={1,2}

hence (a-b)=(u-b)