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NCERT Class 11 Mathematics Solutions: Chapter 1 โ€“ Sets Exercise 1.4 Part 1

Illustration: NCERT Class 11 Mathematics Solutions: Chapter 1 โ€“ Sets Exercise 1.4 Part 1

1. Find the union of each of the following pairs of sets:

(i)

(ii)

(iii) is a natural number and multiple of is a natural number less than

(iv) is a natural number and is a natural number and

(v)

Answer:

(i)

(ii)

(iii) is a natural number and multiple of

is a natural number less than

(iv) is a natural number and

is a natural number and

(v)

2. Let . Is ? What is ?

Answer:

Here,

Yes, .

3. If are two sets such that , then what is ?

Answer: If are two sets such that , then .

4. If ; find

(i)

(ii)

(iii)

(iv)

(v)

(vi)

(vii)

Answer: Given sets are:

(i)

(ii)

(iii)

(iv)

(v)

(vi)

(vii)