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Question

Let R be the relation on Z defined by R={(a,b):a,bz,ab is an integer}. Find the domain and Range of R.

A
z,z
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B
z+,z
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C
z,z
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D
None of these
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Solution

The correct option is A z,z
Given:

R={(a,b):a,b,z,ab is an integer}

As difference of integers are also integers so,

Domain of R=z

Range of R=z, as

ab spans the whole integer values.

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