Question

if A={x:x is a prime number and x<20}; B={x:2x+1,x belongs to W and x<9} then find i)A union B ii)A intersection B iii)A-B iv)B-A​

Answer 1

Step-by-step explanation:

A={2,3,5,7,11,13,17,19}

whole numbers less than 9 are, 0,1,2,3,4,5,6,7,8

B={1,3,5,7,9,11,13,15,17}

AUB={2,3,5,7,11,13,17,19}U{1,3,5,7,9,11,13,15,17}

={1,2,3,5,7,9,11,13,17,19}

A intersection B={3,5,7,11,13,17} (common elements)

A-B={2,3,5,7,11,13,17,19}-{1,3,5,7,9,11,13,15,17}

={2,19}

B-A={1,3,5,7,9,11,13,15,17}-{2,3,5,7,11,13,17,19}

={1,9,15}

Answer 2

Step-by-step explanation:

here is ur answer friend