Recently Asked Questions

• permutation
  Prove that among any 16 distinct digit +ve integer not exceeding 100 there are four distinct ones a,b,c,d such that a+b=c+d ...
  0·1· #Mathematics#Algebra
  asked2010-11-09 08:19:44
• derivative
  see this http://www.artofproblemsolving.com/Forum/viewtopic.php?f=296&t=355045 ...
  0·0· #Mathematics#Calculus
  asked2010-06-30 22:17:07
• derivative
  y^(1/n)+y^(-1/n)=2x then (x^2-1)y''+x y'=n^2 y proof ...
  0·0· #Mathematics#Calculus
  asked2010-06-30 22:14:00