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-1/ (1+x )= -1:( 1+1/3) = -1: 4/3= -1·3/4 =-3/4
ułamek 0,(3) =1/3
Zad.2.
a₁=log₂ ( (7·1 -6)/2·1 )=log₂1/2 =-1
a₂= log₂( ( 7·2 -6)/2·2)=log₂8/4 = log₂2 =1