When do I use Area = ∫ₐᵇ (upper − lower) dx in Applications of Integrals, and what does it mean?
area enclosed between two curves.
Area = ∫ₐᵇ (upper − lower) dx — area enclosed between two curves. Use it when: upper curve above lower on [a,b]. Always check the condition holds before plugging in numbers.
Key point
Area = ∫ₐᵇ (upper − lower) dx
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