If `A={1,2,3,4,5,6,7,8}\ a n d\ B={1,3,5,6,7,8,9},\ t h e n\ A-B={2,4},\ B-A={9}dot`

Explanation

We have given `A={1,2,3,4,5,6,7,8},` and `B={1,3,5,6,7,8,9}`

Then the A - B is the set of all elements that are in A but not in B,

`\Rightarrow` ` A - B={1,2,3,4,5,6,7,8}-{1,3,5,6,7,8,9}={2,4}`

And the `B-A `is the set of all elements that are in B but not in A,

`\Rightarrow` `B - A={1,3,5,6,7,8,9}-{1,2,3,4,5,6,7,8}={9}

Hence we have `A-B={2,4`}, and` B-A={9}.`