Q5 of 68 Page 27

Given A = {1, 2, 3, 4, 5}, S = {(x, y) : x A, y A}. Find the ordered pairs which satisfy the conditions given below:

x + y > 8

Given: A = {1, 2, 3, 4, 5}, S = {(x, y) : x A, y A}


To find: the ordered pairs which satisfy the conditions x + y > 8


Explanation: Given: A = {1, 2, 3, 4, 5}, S = {(x, y) : x A, y A}


We need to find the ordered pair such that x + y>8, where x and y belongs to set A = {1, 2, 3, 4, 5}


1 + 1 = 2<8


1 + 2 = 3<8


1 + 3 = 4<8


1 + 4 = 5<8


1 + 5 = 6<8


2 + 1 = 3<8


2 + 2 = 4<8


2 + 3 = 5<8


2 + 4 = 6<8


2 + 5 = 7<8


3 + 1 = 4<8


3 + 2 = 5<8


3 + 3 = 6<8


3 + 4 = 7<8


3 + 5 = 8


4 + 1 = <8


4 + 2 = 6<8


4 + 3 = 7<8


4 + 4 = 8


4 + 5 = 9>8, so one of the ordered pairs is (4, 5)


5 + 1 = 6<8


5 + 2 = 7<8


5 + 3 = 8


5 + 4 = 9>8, so one of the ordered pairs is (5, 4)


5 + 5 = 10>8, so one of the ordered pairs is (5, 5)


So the set of ordered pairs satisfying x + y>8 is {(4, 5), (5, 4),(5,5)}.


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