More on Progressions

Basic Algebra Review Part 6: More on Progressions (Tagalog)

Harmonic Progressions, HP
$h_n = \dfrac{n}{a_1 + (n - 1)d}$

Infinite Geometric Progression, IGP
$S = \dfrac{a_1}{1 - r}$

Arithmetic Mean
$\displaystyle AM = \dfrac{1}{n} \sum_{i = 1}^n \left( a_i \right)$

Harmonic Mean
$HM = \dfrac{n}{\displaystyle{\sum_{i = 1}^n} \left( \dfrac{1}{a_i} \right)}$

Geometric Mean
$\displaystyle GM = \left[ \prod_{i = 1}^n \left( a_i \right) \right]^{1/n}$

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