1 votes 1 votes $\sum_{.}^{.} (3r^{2} + 5r -21) x^{r}$will be equal to :? Combinatory generating-functions + – Priyanka17 asked Oct 8, 2018 • edited Oct 8, 2018 by srestha Priyanka17 339 views answer comment Share Follow See all 2 Comments See all 2 2 Comments reply srestha commented Oct 8, 2018 reply Follow Share question is not complete I think Plz chk ur question 1 votes 1 votes Priyanka17 commented Oct 9, 2018 reply Follow Share The question is complete @srestha 0 votes 0 votes Please log in or register to add a comment.
0 votes 0 votes (-23x^2+50x-21)/(1-x)^3 mitesh kumar answered Oct 12, 2018 mitesh kumar comment Share Follow See 1 comment See all 1 1 comment reply Priyanka17 commented Oct 13, 2018 reply Follow Share Can u please solve step by step 0 votes 0 votes Please log in or register to add a comment.