Harmonic progression and HP nth term (Reciprocals form an AP; nth term is 1 over (AP nth term in reciprocals))
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Reciprocals form an AP; nth term is 1 over (AP nth term in reciprocals)
What each symbol means
| Symbol | What it stands for |
|---|---|
| A | First term of reciprocal AP |
| D | Common difference of reciprocal AP |
When to use this
All terms non-zero; denominators must not vanish.