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Let f be a subset of ZZ xxZZ such that f...

Let f be a subset of `ZZ xxZZ` such that `f={(xy,x-y):x, y in ZZ}` Is f a mapping from `ZZ "into" ZZ`. Give reasons for your answer.

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CHHAYA PUBLICATION-RELATION AND MAPPING -Very short answer type questions
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  3. Let f be a subset of ZZ xxZZ such that f={(xy,x-y):x, y in ZZ} Is f a ...

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  18. If the mapping {(1,2),(-1,6),(2,3),(3,6) is descibed by the rule f(x)=...

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  19. Let f be subset of ZZxxZZ such that f={(xy,x-y):x,y inZZ} is f a mappi...

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