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Let A={2,4,6}, B={8,10,12,14} and f={(2,...

Let `A={2,4,6}, B={8,10,12,14}` and `f={(2,8),(4,10),(6,12)} ` be a function from `A` to `B`. Show that `f` is one to one but not onto function.

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(a) Neither increasing decreasing as `f(a-hltf(a)` and `f(a+h)ltf(a)`
(b) Decreasing as `f(a-h)ltf(a)ltf(a+h)`
(c ) Increasing a `Sf(a-h)ltf(a)ltf(a+h)`
(d) Neither increasing or decreasing as `f(a-h)ltf(a)` but f(a+h)=f(a)
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