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Question Number 142592 by malwan last updated on 02/Jun/21

I s t h e r e a n y a n d r o i d a p k

c o m p u t e g e n e r a t i n g f u n c t i o n

G F = \underset{i = 1}{\overset{m}{Π}} (\underset{k = 1}{\overset{n_{i}}{Σ}} C_{k}^{n_{i}} x^{k})

t h a n k y o u s o m u c h

Answered by Olaf_Thorendsen last updated on 03/Jun/21

\underset{k = 1}{\sum^{n_{i}}} C_{k}^{n_{i}} x^{k} = {(1 + x)}^{n_{i}} - 1

GF = \underset{i = 1}{\prod^{m}} (\underset{k = 1}{\sum^{n_{i}}} C_{k}^{n_{i}} x^{k}) = \underset{i = 1}{\prod^{m}} ({(1 + x)}^{n_{i}} - 1)