Răspuns:
[0,(3)+1,(3):1 7/9]:(1+1/12)=
0,(3)=3/9; 1,(3)=(13-1)/9=12/9 ; 1 7/9=(1×9+7)/9=16/9
[3/9+12/9 :16/9]: (12+1)/12=
[1/3+4/3 ×9/16]: 13/12=
=(1/3+3/4)×12/13
=(4+9)/12×12/13
=13/12×12/13
=1