oblicz:
(1*1+2*(-1)*(-1)*(-1))/2=
(1*1+2*(-1)*(-1)*(-1))/2=[1+(-2)]/2 = -1/2 liczę na naj.;d
[1*1+2*[-1]*[-1]*[-1]]/2=[1+2*[-1]]/2=1-2/2= -1/2
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(1*1+2*(-1)*(-1)*(-1))/2=[1+(-2)]/2 = -1/2
liczę na naj.;d
[1*1+2*[-1]*[-1]*[-1]]/2=[1+2*[-1]]/2=1-2/2= -1/2