Odpowiedzi

2010-01-11T17:54:17+01:00
2010-01-11T18:02:03+01:00
2010-01-11T18:29:06+01:00
3*(1/2)^2*1/3-(0,5)^3*(1/3)^2+4*(1/2)^3*(1/3)^2=
=3*1/4*1/3-1/8*1/9+4*1/8*1/9=
=1/4-1/8*1/9+1/2*1/9=
=1/4-1/72+1/18=
=18/72-1/72+4/72=
=21/72=7/24