Let A = { a, b}, B = {a, b, c}. Is A ⊂ B ? What is A ∪ B ?

Solution:

We say that A ⊂ B (which is read as "A is a subset of B") if every element of A is present in B.

Here,

A = {a, b} and B = {a, b, c}

We see that every element of A is present in B.

Hence, A ⊂ B.

A υ B is read as the "union of A and B" and it is the set formed with all elements of both A and B.

Thus,

A υ B = {a, b, c}

NCERT Solutions Class 11 Maths Chapter 1 Exercise 1.4 Question 2

Let A = { a, b }, B = {a, b, c}. Is A ⊂ B ? What is A ∪ B ?

Summary:

It is given that A = {a, b}, B = {a, b, c}. We have found that A ⊂ B and A υ B = {a, b, c}.