Question: 3. Show that the mapping :1I defined by f(x) = x, x = I where I is the set of positive integers, is one-one

3. Show that the mapping :1I defined by f(x) = x, x = I where I is the set of positive integers, is one-one

3. Show that the mapping :1I defined by f(x) = x, x = I where I is the set of positive integers, is one-one into.

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