College Algebra / Alg 236 · Atom · ~20 seconds
Evaluating at a Sum
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Evaluating a function at a sum means substituting the whole sum as the input: f(a + b) is computed by feeding in a + b, not by splitting it.
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For f(x) = x²: f(1 + 4) = f(5) = 25. The sum went in first; the machine ran once.
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