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$R (q) = q (90 - \frac{1}{100} q)$

Langkah 1

Gabungkan $q$ dan $\frac{1}{100}$ .

$\frac{d}{d q} [q (90 - \frac{q}{100})]$

$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$