Which of the following conditions represents a one-to-one (injective) function?
University of Ilorin MTH102 sodiomatics past question
- If $f(a_1) = f(a_2)$ then $a_1 = a_2$
- If $f(a_1) = f(a_2)$ then $a_1 \neq a_2$
- If $f(a_1) \neq f(a_2)$ then $a_1 = a_2$
- None of the above
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