In discrete mathematics topic Generating functions. [on hold]












-1














Find the coefficient of x^20 in $$frac{1}{(1+x)(1-x)^3}$$



How to solve sum of r=0 to r=20 in equation



$$sum_{r=0}^{20} (-1)^r*(r+2)*(r+1)$$










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put on hold as off-topic by Antonios-Alexandros Robotis, Travis, KM101, Saad, Foobaz John yesterday


This question appears to be off-topic. The users who voted to close gave this specific reason:


  • "This question is missing context or other details: Please provide additional context, which ideally explains why the question is relevant to you and our community. Some forms of context include: background and motivation, relevant definitions, source, possible strategies, your current progress, why the question is interesting or important, etc." – Antonios-Alexandros Robotis, Travis, KM101, Saad, Foobaz John

If this question can be reworded to fit the rules in the help center, please edit the question.













  • Find the coefficient of $x^{20}$ ... in what?
    – Lord Shark the Unknown
    yesterday










  • (1/(1+x))*(1/(1-x)^3) @LordSharktheUnknown
    – Shubham Pradhan
    yesterday












  • The generic answer to your first question is "partial fractions". Please see math.meta.stackexchange.com/questions/5020 to improve formatting.
    – Lord Shark the Unknown
    yesterday










  • You should use Mathjax to write equations instead of posting an image.
    – harshit54
    yesterday










  • For the second question, break the sum up into its positive and negative terms first and sum them individually.
    – Laars Helenius
    yesterday
















-1














Find the coefficient of x^20 in $$frac{1}{(1+x)(1-x)^3}$$



How to solve sum of r=0 to r=20 in equation



$$sum_{r=0}^{20} (-1)^r*(r+2)*(r+1)$$










share|cite|improve this question









New contributor




Shubham Pradhan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











put on hold as off-topic by Antonios-Alexandros Robotis, Travis, KM101, Saad, Foobaz John yesterday


This question appears to be off-topic. The users who voted to close gave this specific reason:


  • "This question is missing context or other details: Please provide additional context, which ideally explains why the question is relevant to you and our community. Some forms of context include: background and motivation, relevant definitions, source, possible strategies, your current progress, why the question is interesting or important, etc." – Antonios-Alexandros Robotis, Travis, KM101, Saad, Foobaz John

If this question can be reworded to fit the rules in the help center, please edit the question.













  • Find the coefficient of $x^{20}$ ... in what?
    – Lord Shark the Unknown
    yesterday










  • (1/(1+x))*(1/(1-x)^3) @LordSharktheUnknown
    – Shubham Pradhan
    yesterday












  • The generic answer to your first question is "partial fractions". Please see math.meta.stackexchange.com/questions/5020 to improve formatting.
    – Lord Shark the Unknown
    yesterday










  • You should use Mathjax to write equations instead of posting an image.
    – harshit54
    yesterday










  • For the second question, break the sum up into its positive and negative terms first and sum them individually.
    – Laars Helenius
    yesterday














-1












-1








-1







Find the coefficient of x^20 in $$frac{1}{(1+x)(1-x)^3}$$



How to solve sum of r=0 to r=20 in equation



$$sum_{r=0}^{20} (-1)^r*(r+2)*(r+1)$$










share|cite|improve this question









New contributor




Shubham Pradhan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











Find the coefficient of x^20 in $$frac{1}{(1+x)(1-x)^3}$$



How to solve sum of r=0 to r=20 in equation



$$sum_{r=0}^{20} (-1)^r*(r+2)*(r+1)$$







discrete-mathematics






share|cite|improve this question









New contributor




Shubham Pradhan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











share|cite|improve this question









New contributor




Shubham Pradhan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









share|cite|improve this question




share|cite|improve this question








edited yesterday





















New contributor




Shubham Pradhan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









asked yesterday









Shubham Pradhan

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11




New contributor




Shubham Pradhan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.





New contributor





Shubham Pradhan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.






Shubham Pradhan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.




put on hold as off-topic by Antonios-Alexandros Robotis, Travis, KM101, Saad, Foobaz John yesterday


This question appears to be off-topic. The users who voted to close gave this specific reason:


  • "This question is missing context or other details: Please provide additional context, which ideally explains why the question is relevant to you and our community. Some forms of context include: background and motivation, relevant definitions, source, possible strategies, your current progress, why the question is interesting or important, etc." – Antonios-Alexandros Robotis, Travis, KM101, Saad, Foobaz John

If this question can be reworded to fit the rules in the help center, please edit the question.




put on hold as off-topic by Antonios-Alexandros Robotis, Travis, KM101, Saad, Foobaz John yesterday


This question appears to be off-topic. The users who voted to close gave this specific reason:


  • "This question is missing context or other details: Please provide additional context, which ideally explains why the question is relevant to you and our community. Some forms of context include: background and motivation, relevant definitions, source, possible strategies, your current progress, why the question is interesting or important, etc." – Antonios-Alexandros Robotis, Travis, KM101, Saad, Foobaz John

If this question can be reworded to fit the rules in the help center, please edit the question.












  • Find the coefficient of $x^{20}$ ... in what?
    – Lord Shark the Unknown
    yesterday










  • (1/(1+x))*(1/(1-x)^3) @LordSharktheUnknown
    – Shubham Pradhan
    yesterday












  • The generic answer to your first question is "partial fractions". Please see math.meta.stackexchange.com/questions/5020 to improve formatting.
    – Lord Shark the Unknown
    yesterday










  • You should use Mathjax to write equations instead of posting an image.
    – harshit54
    yesterday










  • For the second question, break the sum up into its positive and negative terms first and sum them individually.
    – Laars Helenius
    yesterday


















  • Find the coefficient of $x^{20}$ ... in what?
    – Lord Shark the Unknown
    yesterday










  • (1/(1+x))*(1/(1-x)^3) @LordSharktheUnknown
    – Shubham Pradhan
    yesterday












  • The generic answer to your first question is "partial fractions". Please see math.meta.stackexchange.com/questions/5020 to improve formatting.
    – Lord Shark the Unknown
    yesterday










  • You should use Mathjax to write equations instead of posting an image.
    – harshit54
    yesterday










  • For the second question, break the sum up into its positive and negative terms first and sum them individually.
    – Laars Helenius
    yesterday
















Find the coefficient of $x^{20}$ ... in what?
– Lord Shark the Unknown
yesterday




Find the coefficient of $x^{20}$ ... in what?
– Lord Shark the Unknown
yesterday












(1/(1+x))*(1/(1-x)^3) @LordSharktheUnknown
– Shubham Pradhan
yesterday






(1/(1+x))*(1/(1-x)^3) @LordSharktheUnknown
– Shubham Pradhan
yesterday














The generic answer to your first question is "partial fractions". Please see math.meta.stackexchange.com/questions/5020 to improve formatting.
– Lord Shark the Unknown
yesterday




The generic answer to your first question is "partial fractions". Please see math.meta.stackexchange.com/questions/5020 to improve formatting.
– Lord Shark the Unknown
yesterday












You should use Mathjax to write equations instead of posting an image.
– harshit54
yesterday




You should use Mathjax to write equations instead of posting an image.
– harshit54
yesterday












For the second question, break the sum up into its positive and negative terms first and sum them individually.
– Laars Helenius
yesterday




For the second question, break the sum up into its positive and negative terms first and sum them individually.
– Laars Helenius
yesterday










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