One-to-One Functions
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State
A one-to-one function is a function in which each output value corresponds to exactly one input value; outputs, like inputs, never split.
Show
f(x) = x² fails the standard: f(2) and f(−2) both output 4, so the output 4 belongs to two inputs.
Builds on
- Nothing — this is a starting point.
Unlocks
- Nothing yet depends on this.