Răspunsuri

2014-01-08T21:34:28+02:00
11la 2n + 11 la( 2n+1 )+ 11 la (2n+2)+ 11la (2n+3)=11la 2n(1+11+11 la 2 +11 la 3)=11la 2n [1+11(1+11+11 la 2)]=11 la 2n(1+1463)=11la 2n* 1464