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1 f ’’(x) > 0 for all x in I f(x) concave Up Concavity Test Sec 4.3: Concavity and the Second Derivative Test the curve lies above the tangentsthe curve.

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Presentation on theme: "1 f ’’(x) > 0 for all x in I f(x) concave Up Concavity Test Sec 4.3: Concavity and the Second Derivative Test the curve lies above the tangentsthe curve."— Presentation transcript:

1 1 f ’’(x) > 0 for all x in I f(x) concave Up Concavity Test Sec 4.3: Concavity and the Second Derivative Test the curve lies above the tangentsthe curve lies below the tangents 2 f ’’(x) < 0 for all x in I f(x) concave Down Concavity Test

2 1 f ’’(x) > 0 for all x in I 2 f(x) concave Up Concavity f ’’(x) < 0 for all x in I f(x) concave Down Sec 4.3: Concavity and the Second Derivative Test

3 Example: Study the concavity of the function Sec 4.3: Concavity and the Second Derivative Test

4 F092 Sec 4.3: Concavity and the Second Derivative Test

5 1 2 Inflection point: + _ _ + Sec 4.3: Concavity and the Second Derivative Test

6 Find all inflection points

7 Example: Find all inflection points of Sec 4.3: Concavity and the Second Derivative Test

8 8 F091 Sec 4.3: Concavity and the Second Derivative Test

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10 1 2 second Derivative Test: 1 2 Sec 4.3: Concavity and the Second Derivative Test 1 2 second Derivative Test: the test fails. The function ƒ may have a local maximum, a local minimum, or neither. 1 2 1 2 1 2

11 F121 Sec 4.3: Concavity and the Second Derivative Test

12 F081 Sec 4.3: Concavity and the Second Derivative Test

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