Maths-
General
Easy
Question
Let X={1,2,3,4} and Y={1,3,5,7,9} . Which of the following is relations from X to Y-
The correct answer is:
To find the relation from X to Y.
From the given option,
R1 = {(x, y) : y = 2 + x, x ∈ X, y ∈ Y}
x = 1 → y = 1 + 2 = 3
x = 2 → y = 2 + 2 = 4
x = 3 → y = 3 + 2 = 5
x = 4 → y = 4 + 2 = 6
x = 5 → y = 5 + 2 = 7
R = {(1, 3), (2, 4), (3, 5), (4, 6), (5, 7)}
In (4, 6), 6 ∉ either X or Y
R1 is not a relation between X and Y.
In R4, the element (7, 9) is present which relates set Y to set Y
R4 is not a relation between X and Y.
So the correct relations are R2 and R3.
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