1019510
[Commentary:
Examples of arithmetic, geometric, and harmonic porgressions, and rules for their general terms.
(The terms of a harmonic progression are the reciprocals of an arithmetic porgression.)]
Arithmetica. 3. 6.
Geometrica. 3. 6.
Harmonica. 6. 3.
Geometrica. 3. 6.
Harmonica. 6. 3.
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