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Math 211 Business Calculus Applications of Derivatives

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– p. 19/34<br />

Max versus Min<br />

R = x 3 −21x 2 +120x+500<br />

R ′ (x) = 3x 2 −42x+120<br />

Critical points: 4 and 10<br />

R ′′ (x) = 6x−42<br />

Use the second derivative test<br />

x R(x) R ′′ (x) = 6x−42 Concl<br />

4 708

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