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If f:R---R, f(x)=x 2 then f is: surjective or injective? why?

If f:R---R, f(x)=x2 then f is:
surjective or injective? why?

Grade:12

1 Answers

Harsh Patodia IIT Roorkee
askIITians Faculty 907 Points
6 years ago
It is neither surjective nor injective
as negative numbers in codomain don’t have any preimages

And x, -x in domain will be having same images.So not 1-1

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