Template:Arsum

Simple arithmetic sum function.

Use:{{arsum|<start>|<end>|<count>}}

Description start - min value count - number of steps end - max value

eg: Sum (x/2) from 1->10 Start = 1/2 = 0.5 Count = 10 End = 10/2 = 5.5

Correct formula is: (0.5*count*(start+end))

For above example:

(0.5*10*(1/2+10/2)) = 5*(11/2) = 27.5