OpenStax, Precalculus 2e §12.4 Derivatives · Exercise 63 · Algebra · Expressions

Derivatives · Exercise 63

The cost of producing $x$ cellphones is described by the function $C (x) = x^{2} - 4 x + 1000.$

Find the approximate marginal cost, when 20 cellphones have been produced, of producing the 21^st cellphone.

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OpenStax, Precalculus 2e · §12.4 Derivatives · Exercise 63

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