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→Notes for teachers
#The reciprocals of the arithmetic progression --------Harmonic progression
#The reciprocals of the arithmetic progression --------Harmonic progression
#The ratio between any term and its preceding term is constant -------Geometric progression.
#The ratio between any term and its preceding term is constant -------Geometric progression.
[http://www.freeganita.com/en/nt.htm for a notes of progression clicik here]
===Activity ===
===Activity ===