Question

Daca a=1/2+2/3+3/4+...+1999/2000,b=1/2+1/3+1/4+...+1/2000,atunci (a+b) | (trei puncte verticale) 1999
/-supra

Answer 1

   a = 1/2 + 2/3 + 3/4 + ... + 1999/2000
   +
   b = 1/2 + 1/3 + 1/4 + ... +     1 / 2000
a+b=  1   +   1  +   1  + ... +       1       = 1 * 1999 = 1999