| Spread WinRT Documentation > Formula Reference > Formula Functions > SERIESSUM | 
This function returns the sum of a power series.
SERIESSUM(x,n,m,coeff)
This function has these arguments:
| Argument | Description | 
|---|---|
| x | Value to evaluate in the power series | 
| n | Power to which to raise x | 
| m | Step by which to increase n for each term in the series | 
| coeff | Set of coefficients for the series (the values of a1, a2, ... ai) | 
The power series formula is:

where x, n, and m are the similarly named arguments and a is the coeff argument.
Accepts numeric data for all arguments. Returns numeric data.
SERIESSUM(34,3,2,A1:A6)
SERIESSUM(12,3,1,B2:B24)