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[" 19.Prove that the function,"f:N rarr ...

[" 19.Prove that the function,"f:N rarr N" is "],[" defined by "f(x)=x^(2)+x+1" is one-one but "],[" not onto.Find inverse of "f:N rarr S," where "],[" S is range of "f" .Dethi "2019]

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