Solutia cu calculatorul si o incercare mai departe ...
Cod sage:
sage: sum( (-1)^k * k^50 * binomial( 99, k ), k, 0, 99 )
0
sage: sum( (-1)^k * k^98 * binomial( 99, k ), k, 0, 99 )
0
sage: sum( (-1)^k * k^99 * binomial( 99, k ), k, 0, 99 )
-93326215443944152681699238856266700490715968264381621468592
963895217599993229915608941463976156518286253697920827223758
2511852109168640000000000000000000000
sage: sum( (-1)^k * k^99 * binomial( 99, k ), k, 0, 99 ) / factorial( 100 )
-1/100
(Mai sus am rupt manual rezultatul pe trei rânduri, altfel pagina pro-didactica devine foarte lata.)