1. A = {1,2,3,4}, B = {3,4,5}, Find B subset A ...

Solution:
Here `A={1,2,3,4}`,`B={3,4,5}`

is `B sub A ?`

If A and B are sets and if every element of A is an element of B, then we can say that A is a subset of B.

Here `5inB` but `5!inA`, so we can say that `B` is not subset of `A.`

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2. A = {x<=5; x in N}, B = {1<=x<=8; x in N}, Find A subset B ...

Solution:
`A={x<=5; x in N}`
`:.A={1,2,3,4,5}`

`B={1<=x<=8; x in N}`
`:.B={1,2,3,4,5,6,7,8}`

is `A sub B ?`

If A and B are sets and if every element of A is an element of B, then we can say that A is a subset of B.

Here every element of `A` is an element of `B`, so we can say that `A sub B`.

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