Question

I need to prove it.
It's the question of class 11th(Elements), Chapter 1st Sets.​

Answer 1

Step-by-step explanation:

if you take examples .

as A={1,2,3}

B={1,2,3,4}

A-B= {3}

as {3} is subset of A.

we can tell

A-B is subset of A . because 3 is a subset of A.

hope it helps...