=NPV(rate, range) + starting?

in database we study the fisibility
just tell me who does this function works
and is is ment by (rate, range) for me i c it's xy-coordenets

Answers:
Rate is the discount rate over a period.
The range is probably the list of values representing the payments or income or whatever.

It's not supposed to be x-y. It's normally something used in an Excel sheet, for example. Rate would be a cell, and Range would a range of cells with the payments. It just looks like a normal formula. Something like =NPV(A1, A2:A100) + B1

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