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Three numbers are in harmonic progression if and only if their reciprocals are in
Aarithmetic progression
Bgeometric progression
Charmonic progression
Dno fixed relation
Answer & Solution
Correct answer: A. arithmetic progression
A harmonic progression is defined by taking reciprocals and obtaining an arithmetic progression. So if $a,b,c$ are in HP, then $\frac1a,\frac1b,\frac1c$ are in AP.
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