Question

Show that if A is a subset of B, then C-B is subset C - A.​

Answer 1

Answer:

Answer

Let A⊂B

To show: C−B⊂C−A

Let x∈C−B

⇒x∈C and x∈B

⇒x∈C and x∈A   (A⊂B)

⇒x∈C−A

∴C−B⊂C−A