alleryIf a curve lies below the x-axis, its integral comes out:
APositive
BDoubled
CUnchanged
DNegative
Answer & Solution
Correct answer: D. Negative
1. Below the axis the value of y is negative.
2. Each strip then contributes a negative amount.
3. So the integral comes out negative.
4. The answer is negative.
_Source: syllabus Mathematics, Ch 8 'Application of Integrals'_
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