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Evaluating versus Solving

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State

Evaluating a function answers "what output does this input give"; solving f(x) = k answers "what inputs give this output" — the two questions run in opposite directions.

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For f(x) = 2x + 3: evaluating at 5 gives 13; solving f(x) = 13 recovers x = 5.

Builds on

  • Nothing — this is a starting point.

Unlocks

  • Nothing yet depends on this.