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 Oct 2 comment Use mathematical induction to prove that 9 divides $n^3 + (n + 1)^3 + (n + 2)^3$; Looking for explanation, I already have the solution. @labbhattacharjee the problem asks for that procedure Sep 18 comment Is $\{1, 2, 3\}\times \Bbb Z$ uncountable? That was perfect, thank you! Sep 18 comment Is $\{1, 2, 3\}\times \Bbb Z$ uncountable? I'm really new to Discrete Mathematics (first week) so I'm having a bit of trouble understanding what you mean by (a, b) -> 3b + a - 1, could you possibly give me a brief explanation? Sep 18 comment Is $\{1, 2, 3\}\times \Bbb Z$ uncountable? no, unfortunately it was as I wrote it. May 2 comment Can rainbows be considered to have mathematical patterns? @TrevorWilson, my apologies, I didn't mean to make it sound so. Any sort of pattern of any kind is welcomed. Mar 28 comment Let S = $\{(x, y, z) \;\text{which spans}\;\Bbb R^3\;|\; 2x = 3z \;,\;\; y = -z\}$ Sorry for the misleading notation. The vectors should be v1 = x, v2 = y, v3 = z if I'm not mistaken. Feb 21 comment Can I further reduce this matrix? ahhh! Thank you very much for the explanation and for your help. I really appreciate it. Feb 21 comment Can I further reduce this matrix? @WillNelson, I see, thank you for pointing that out! Jan 31 comment First week in Linear Algebra, need some help on this simple problem ahhhhhh! I see what you were trying to illustrate and I do recall the teacher briefly discussing this at the end of lecture. Thank you very much! Jan 31 comment First week in Linear Algebra, need some help on this simple problem Unfortunately I'm limited to the techniques taught in this section. Which is basically only sub and back-sub Dec 18 comment What to plug in for n for this particular power series I understand now. Thank you very much for clearing that up! Dec 18 comment Confused as to the right answer to this summation, am I wrong (most likely) or is the answer provided wrong? Right right! How could I forget. Thank you for clearing that up. Post it as an answer if you'd like so I can accept it. Dec 17 comment Length of the curve defined by $y=6 x^{3/2} - 7$ from $x=1$ to $x = 9\;$? @DavidMitra, Yes, thank you (: Dec 17 comment Length of the curve defined by $y=6 x^{3/2} - 7$ from $x=1$ to $x = 9\;$? Thank you, I don't know why I was blanking out. I know how to do this already. Thank you for answering though (-: Dec 17 comment Length of the curve defined by $y=6 x^{3/2} - 7$ from $x=1$ to $x = 9\;$? I just realized it's arclength :-D I know how to do this. Dec 17 comment Where am I making my mistake? (intervals of convergence) My homework website must've been acting up (it'll do this sometimes) so it must've not been accepting the correct answer. I just typed in -2 & 14 and it worked. Thank you for answering froggie. Dec 17 comment Where am I making my mistake? (intervals of convergence) @macydanim THank you very much! Dec 17 comment Where am I making my mistake? (intervals of convergence) yes, sorry, that was a mistake. I meant to write -2. Dec 17 comment why does this integral diverge? @macydanim , yes it is. Thank you very much. I'm new to posting here so I apologize for not being up to date with the formatting :-( Dec 17 comment Gabriel's horn, calculus Integration I completely forgot to multiply by pi. Thank you very much for your illustration, it was very helpful.