Question

f A={x:x is a positive factor of 28}, B={x:x is a positive multiple of 6 less than 25} then

find

(i)AUB (ii)A –B (iii) B–A (iv) AintersectionB​

Answer 1

Answer:

A={1, 2,4,7,14,28}, B={6, 12,18,24} (I) AUB={1, 2,4,7,14,28}U{6, 12,18,24} ={1, 2,4,6,7,12,14,18,24,28} (ii) A-B={1, 2,4,7,14,28}-{6,12, 18,24}={1, 2,4,14,28}.(iii) B-A={1, 2,4,7,14,28}-{6, 12,18,24}={6, 12,18,24}