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The geometric mean of two positive numbers a and b is:
AThe half of ab
BThe half of a b
CThe root of ab
DThe root of a b
Answer & Solution
Correct answer: C. The root of ab
1. For 2 and 8 the value is 4.
2. Those three form a geometric progression.
3. It is the square root of the product ab.
_Source: NCERT Class 11 Mathematics, Ch 8 'Sequences and Series'_
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