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[" 1.Show that the function "f:R(*)rarr ...

[" 1.Show that the function "f:R_(*)rarr R_(*)" defined by "f(x)=(1)/(x)" is one-one and onto,"],[" where "R_(*)" is the set of all non-zero real numbers.Is the result true,if the domain "],[R_(*)" is replaced by "N" with co-domain being same as "R_(*)?]

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