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The geometric mean of two positive numbers a and b is:
AThe product ab itself
BSquare root of ab
CHalf of a plus b
DThe difference a minus b
Answer & Solution
Correct answer: B. Square root of ab
1. For 2 and 8 the mean is 4.
2. 4 is the square root of 16, their product.
3. So the geometric mean is the square root of ab.
_Source: NCERT Class 11 Mathematics, Chapter 8, Sequences and Series._
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