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Question

The figure shows a relationship between the sets P and Q. Write this relation.

(i) In set builder form
(ii) In roster form
What is its domain and range ?

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Solution


Given
R is a relation from P to Q
P={5,6,7}
Q={3,4,5}

(i) Set builder form
R={(x,y):y=x2, xP,yQ}

(ii) Roster form
R={(5,3),(6,4),(7,5)}

Domain & Range
Domain is the set of first elements of ordered pairs in relation R
Hence, domain ={5,6,7}
Range is the set of second elements of ordered pairs in relation R.
Hence, range ={3,4,5}

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