а) так как (1/7)=(2/14), то
=(1/14)+(2/14)+(3/14)+(1/14)=7/14=1/2=0,5
б) (1/6)=(15/90); (1/45)=(2/90); (11/30)=(33/90); (7/30)=(21/90)
==(15/90)+(2/90)+(33/90)+(2/90)+ (21/90)=(73/90)
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а) так как (1/7)=(2/14), то
=(1/14)+(2/14)+(3/14)+(1/14)=7/14=1/2=0,5
б) (1/6)=(15/90); (1/45)=(2/90); (11/30)=(33/90); (7/30)=(21/90)
==(15/90)+(2/90)+(33/90)+(2/90)+ (21/90)=(73/90)