NCERT Class 11-Math's Exemplar Chapter 1 Sets CBSE Board Problems

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Question 19:

For all sets A and B,

Answer:

Given: There are two sets A and B

To prove:

Take L.H.S

Distributive property of set:

= R.H.S

Hence Proved

Question 20:

For all sets A and B,

Answer:

Given: There are two sets A and B

To prove:

Take L.H.S

Distributive property of set:

Hence Proved

Question 21:

For all sets A and B,

Answer:

Given: There are two sets A and B

To prove:

Take L.H.S

Distributive property of set:

Hence Proved

Question 22:

Is an empty set? Justify your answer.

Answer: