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Method of Substitution to Find the Solution of a Pair of Linear Equations

Let X=1,2,3,4...

Question

Let X = {1,2,3,4,5} and Y = {1,3,5,7,9}. Which of the following is/are relations from X to Y?

A

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B

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C

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D

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Solution

The correct options are
A

B

C

A relation between two sets is a collection of ordered pairs containing one object from each set. If the object x is from the first set and the object y is from the second set, then the objects are said to be related if the ordered pair is in the relation.
$R_{4}$ is not a relation from X to Y , because (7,9) $\notin$ X × Y .

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