Răspunsuri

2014-11-07T16:05:49+02:00
A= 6+6² +6³ +........+6^1996    Uc(A) = Uc(6+6+6+.......+6) = Uc(6·1996) =6
B= 9+9² +9³ +.......+9^1997        Uc(B)= Uc(9)+ Uc(9²) +Uc(9³) +.......+Uc(9^1997 ) =
Uc(9+1+9+1+........+9) = Uc(1·999+9·998) = Uc(9+2) =1
Uc(A+B) = 7
Uc(A·B) = 6