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calculati 1,(3):1,(7)cat face

Răspuns :

1,(3) : 1,(7) =

= (13 - 1)/9 x 9/(17 - 1)

= 12/9 x 9/16

= 3/4

1,(3):1,(7)=

(13-1)/9*(17-7)/9

12/9×16/9

3/4