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Math 211 Business Calculus Applications of Derivatives

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– p. 11/34<br />

Graphs continued<br />

Since the first derivative f ′ 3<br />

(x) = is always<br />

(x+1)<br />

2<br />

positive, the function is always increasing.<br />

Since the second derivative f ′′ (x) = − 6<br />

(x+1) is<br />

{ 3 negative ifx > −1<br />

positive ifx < −1 ,<br />

{ concave down if x > −1<br />

the graph is<br />

concave up if x < −1 ,<br />

There are no critical points and

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