# Ejercicio 05.8

kill(all)$

A[n]:=1/(n! * (n+2));

B[n]:=1/((n+1)!);

C[n]:=1/((n+2)!);

B[n] - C[n];

minfactorial(%);

ratsimp(%);

S1=sum(B[n], n, 0, inf);
'S1=S1:%e-1;

S2=sum(C[n], n, 0, inf);
'S2=S2:%e-2;

'Suma=S1-S2;