51. maximizina Propit. In business, prokit is the di Pperence between revenue and cost; thatis, = - total cost, Total propit total revenue RIx)- Ck). where x is the bumber ok units sold. Find the maximum propit and the number OF units that must be sold in order to Vield maximu mn %3D popit, for each OF the Following n- 5x2

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