alleryThe geometric mean of two positive numbers a and b is which quantity?
AThe square of a plus b
BThe square of a minus b
CThe square root of ab
DThe square root of a plus b
Answer & Solution
Correct answer: C. The square root of ab
1. The arithmetic mean adds and halves.
2. The geometric mean multiplies and takes a root.
3. The geometric mean of two positive numbers a and b is the number root ab.
4. So the answer is the square root of ab.
_Source: syllabus Mathematics, Ch 8 'Sequences and Series'_
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