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September 1, 2014

September 1, 2014

Posted by **sharan** on Saturday, November 24, 2012 at 1:29am.

A. one-one and onto

B. onto not one-one

C. one-one not onto

D. neither one-one nor onto

- maths -
**Steve**, Saturday, November 24, 2012 at 4:53amThink of the shape of the graph.

If we had f:R->R, it would be (A).

By restricting to N, it is (C), since many numbers (like 2) are not in the range.

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