G.P. Series

A series is in Geometric Progression (G.P.), if it has the following form:

a, ar, ar², ar³,ar⁴ ....
where a=First term and r=Common ratio.


Some useful derivations from A.P. Series:

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A.P. Series

A series is in Arithmetic Progression (A.P.), if it has the following form:
a, a+d, a+2d, a+3d, ....
where a=First term and d=Common difference.


Some useful derivations from A.P. Series:

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Series (Natural Numbers)

Addition of Natural numbers.

• (1 + 2 + 3 + 4 + ..... + n) =n(n + 1) / 2

Addition of Square of Natural numbers.

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