(i) If A={x:x is a multiple of 2, `x lt 15}` and B=`{x:x in N}` then find A and B (ii) If A={x:x is an integer and B={x:x is a natural number} then find A-B.

Explanation

(i) A=P{x:x is a multiple of 2, `x lt 15}` ={2,4,6,8,10,12,14}
B=`{x,x in N}={1,2,3,4….}`
`(therefore A sub B)`
(ii) A={x:x is an integer},
A-B={,……, -3,-2,-1,0}
={x:x is negative integer or zero}
Or {x:x is non-positive integer}