Answer:
Injectivity : Lee
x1, x1 such
that f(x1) = f(x2)
is one ? one.
Surjectivity
: Let
be any
element
Corresponding
to every element
,
there exists
such
that f
is onto
However
if the domain R* of f is replaced by N, then function f will remain one-one but
not onto.
This
is because for comain N, range of f(x) is
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