If f is a function from the set X to the set Y , then X is called  , the range of the function f , the domain of the function f, the codomain of the function f , the rule of the function f , If f is a function from the set X to the set Y , then Y is called, the domain of the function f, the codomain of the function f, the range of the function f, the rule of the function f, If the relation R = { ( 4 , 3 ) , ( 1 , 3 ) , ( 2 , 5 ) }  ,then R represents a function where its range is ..............................., { 1 , 2 , 4 }, { 4 , 1 , 2 , 3 , 5 } , { 3 , 5 } , N , If R is a function from X to Y where X = { 2 , 4 , 5 }  , Y = { 6 , 7 } and R = { ( 2 , 6 ) , ( a , 6 ) , ( 5 , 6 ) } , then a = .........., 4, 5, 12, 6.

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