Moderate
The Harmonic Mean of two number is 'a' and 'b' is given by ____________?
Correct answer: B. 2ab/a+b
- A. a+b/2
- B. 2ab/a+b
- C. √ab
- D. None of these
Explanation
For two values, the harmonic mean is obtained by dividing twice their product by their sum: 2ab/(a+b). This differs from the geometric mean, which is √ab.
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