Mathematics-Progressions

[neenuroy]

I need all formulas related to progressions...AP,GP,HP...all the formulas to find the sum of these progressions..Please i need it immediately

[hello3719]

try deriving them.

[Gokul43201]

http://mathworld.wolfram.com/GeometricSeries.html
http://mathworld.wolfram.com/HarmonicSeries.html
http://mathworld.wolfram.com/ArithmeticSeries.html