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Differentiation (p-1) — Maths (commerce) STD 11 Commerce / Arts — Question

Maharashtra BoardEnglish MediumSTD 11 Commerce / ArtsMaths (commerce)Differentiation (p-1)1 Mark
Question
Solve the following examples: : The demand function of a commodity is given as $P=20+D-D^2$. Find the rate at which price is changing when demand is 3 .
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