978 reputation
1527
bio website
location United States
age
visits member for 3 years, 5 months
seen Sep 1 '13 at 5:15

Nov
8
awarded  Commentator
Nov
8
awarded  Editor
Nov
8
revised Number of terms in a trinomial expansion
edited body
Nov
8
comment Number of terms in a trinomial expansion
Oops sorry that should be 496..
Nov
8
comment Number of possible solutions for an equation
Well if we had four balls, then a wall at the end would represent z being zero. Ok so youre saying if were not including zero, then we cant have a wall at the end. But this works fine for our last case where we do include zeros? Looking through my notes, I do see a general form for this, but when we do include zeros, I dont understand the intuition of having 27 on top. Doing a manual count of possible positions of the wall, it seems like there would only be 26 possibilites..
Nov
8
asked Number of terms in a trinomial expansion
Nov
8
awarded  Scholar
Nov
8
accepted Number of possible solutions for an equation
Nov
8
comment Number of possible solutions for an equation
Ok wait I think I get it, but why 24 and not 25 in the first case? What would putting a wall at the end of the last ball represent?
Nov
8
comment Number of possible solutions for an equation
Wait...whattttttt
Nov
8
awarded  Supporter
Nov
8
comment Number of possible solutions for an equation
No it isnt what? Complicated?
Nov
8
comment Number of possible solutions for an equation
You sure its supposed to be that complicated? It was given as a minor excercise problem that should be abled to solve on paper..
Nov
8
comment Combinations and Permutations Question
Oh ok I see, but how is that we know that half of those subsets are odd and half are even?
Nov
8
asked Number of possible solutions for an equation
Nov
8
comment Combinations and Permutations Question
How do I know that the number of even and odd subsets are equal?
Nov
8
comment Combinations and Permutations Question
Wait so is my answer correct? I'm not understanding your answer..
Nov
8
asked Combinations and Permutations Question
Nov
1
awarded  Student