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Let A = {2, 3} and B= {3, 5} (i)Find (A × B) and n(A × B). (ii) How many relations can be defined from A to B?
Let A = {2, 3} and B= {3, 5}
(i)Find (A × B) and n(A × B).
(ii) How many relations can be defined from A to B?
CBSE | Class 11 | Excercise 2C | Maths | Relations | RS Aggarwal
Let A = {2, 3} and B= {3, 5}
(i)Find (A × B) and n(A × B).
(ii) How many relations can be defined from A to B?
  • Answer : Given: A = {2, 3} and B= {3, 5}

 

(i) (A × B) = {(2, 3), (2, 5), (3, 3), (3, 5)}

Therefore, n(A × B) = 4

(ii) No. of relation from A to B is a subset of Cartesian product of (A × B). Here no. of elements in A = 2 and no. of elements in B = 2.

So, (A × B) = 2 × 2 = 4

So, the total number of relations can be defined from A to B is

= 24 = 16

i

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