Is there anybody can help me to get an expansion for the following finite Power Sum?
(Sum[(\[Beta]*x)^i/i!, {i, 0, m - 1}])^n
As I know the infinite power sum can be expressed as follows
![](/c/portal/getImageAttachment?filename=powersum.jpg&userId=94187)
but what about the case of finite power sum?
Thanks for your support