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Question

The relation R in the set of natural number N is defined by xRyx24xy+3y2=0, x,yN then R is

A
reflexive but not symmetric and not transitive
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B
symmetric but not reflexive and not transitive
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C
transitive but not reflexive and not symmetric
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D
equivalence relation
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Solution

The correct option is A reflexive but not symmetric and not transitive
x24xy+3y20
x23xyxy+3y2=0
x(x3y)y(x3y)=0
(x3y)(xy)=0
x=3y,y
xRy=(x,y)x=y Reflexive
xRy=(x,y):x=3y
So it is reflexive but not symmetric and not transitive.

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