A = {1,2,3,4}, Find 0 belongsto A ...
Solution:
Here `A={1,2,3,4}`
is `0 in A = 0 in {1,2,3,4}`
`= false`
A = {x<=5; x in N}, Find 1 belongsto A ...
Solution:
`A={x<=5; x in N}`
`:.A={1,2,3,4,5}`
is `1 in A = 1 in {1,2,3,4,5}`
`= true`
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