Question

A={x:x is multiple of 3},B{x:x is multiple of 5} then find A-(AB) ​

Answer 1

Step-by-step explanation:

Set A in Roaster form= {3,6,9,12....}

Set B in Roaster form = {5,10,15,20....}

A-(AB),

{3,6,......}-{(3,5),(3,10),....}

{x:x is a multiple of 3}

If it is A-B,

then {3,6,9,12,18,......}

In set builder form {x:x is a multiple of 3 where x is not a multiple of 5}