Suppose $f : \mathbf { N } \rightarrow \mathbf { N }$

question 209

Short Answer

Suppose $f : \mathbf { N } \rightarrow \mathbf { N }$ has the rule $f ( n ) = 3 n ^ { 2 } - 1$ \quad Determine whether $f$ is 1-1 .

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Definitions:

Fuel-Air Explosive

A type of weapon that disperses fuel into the air and ignites it, creating a large blast wave of high temperature and pressure.

Detonator

A device used to trigger an explosion in dynamite and other high explosives, typically initiating a larger, secondary explosive charge.

Lower Explosion Limit (LEL)

The lowest concentration of a particular gas or vapor in air that can produce a flash of fire in presence of an ignition source.