1.

Pick out a function which is one - one but not onto

Answer»

Let `A={a,B,C},B={2,4}`. Define
`f:ATOB" as "f(a)=4,f(b)=2,f(c)=2`.
Let `A={a,b,c},B={2,4,6,8}`. Define
`f:AtoB" as "f(a)=8,f(b)=2,f(c)=4`.
Let `A={a,b,c},B=(2,4,6}`. Define
`f:AtoB" as "f(a)=2,f(b)=4,f(c)=6`
Let `A={a,b,c},B={2,4,6,8}`. Define `f:AtoB" as "f(a)=2,f(b)=2,f(c)=2`.

Answer :B


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