Odpowiedzi

2009-11-22T15:45:43+01:00
A)
AM = (1/2)c -(1/2)b
BN = -(1/2)c +(1/2)a
CP =b +(1/2)c
b)
AM + BN + CP =[c +(1/2)a]+[-c -(1/2)b ] +[b +(1/2)c]=
= (1/2)a +(1/2)b +(1/2)c =0