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For a region in the first quadrant, y is taken as:
ANegative
BInfinite
CUndefined
DPositive
Answer & Solution
Correct answer: D. Positive
1. In the first quadrant both coordinates are positive.
2. The height of each strip is therefore positive.
3. So y is taken as positive.
_Source: NCERT Class 12 Mathematics Part II, Chapter 8, Application of Integrals._
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