xem chung mjnh toan hox ney!!!!
H0.c = Kho^ng ro't
Kh0^ng h0c = Ro't
co^ng ve^ theo ve^, ta co:
Ho.c + Kho^ng ho.c = Kho^ng ro't + Ro't
Dat "Ho.c" va' "Ro't" lam nha^n tu chung, ta co":
=> Ho.c ( Kho^ng + 1) = Ro't ( Kho^ng + 1)
=> H0.c = Rớt
Zay thj hoc lam j cho????