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Definite integrals, areas and volumes

Definite integrals, areas and volumes · Diagrams

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Horizontal strips and the y-axis

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A horizontal strip has width g(y) and height delta y. Areas right of the y-axis use a positive integral; areas left use its negative; mixed regions split at the crossing and add positive areas.
A horizontal strip has width g(y) and height delta y. Areas right of the y-axis use a positive integral; areas left use its negative; mixed regions split at the crossing and add positive areas.
A horizontal strip has width g(y) and height delta y. Areas right of the y-axis use a positive integral; areas left use its negative; mixed regions split at the crossing and add positive areas.
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