Question

if A={x:x€Nand x<20} and B={x: x€N and x≤5}, then A-B in set builder form is​

Answer 1

Answer:

A={1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19}

B={1,2,3,4,5}

A-B={1,2,3,4,5,...............,18,19}-{1,2,3,4,5}

={6,7,8,9,10,11,12,13,14,15,16,17,18,19}

set builder form={x:x€N x>6 & x<20}