Question

If A and B are two sets such that A is a subset of B then find A union B

Answer 1

Answer:

if A is a subset of B .

then A union B= B

Answer 2

Answer:

let A={1,2}

B={1,2,3}

every element of A is in B.

this implies A is a subset of B.

A union B=B

i.e A union B={1,2,3}

Step-by-step explanation: