ajutati-ma va rog!
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Răspuns:
Explicație pas cu pas:
0,(3) = 3/9 = 1/3
1,(3) = (13 - 1)/9 = 12/9 = 4/3
1 7/9 = 16/9
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(1/3 + 4/3 : 16/9) : (12/12 + 1/12) = (1/3 + 4/3*9/16) : 13/12
= (1/3 + 3/4) *12/13 = (4/12 + 9/12) *12/13 = 13/12*12/13 = 1