EX 15 VREAU EXPLICATIE LA MODUL DE REZOLVARE PLS!!!!!!

ex:14
Explicație pas cu pas:
0,(4) = 4/94*4/9 = 16/90,0(4) = 4/9040*4/90 = 16/90,00(4) = 4/900400*4/900 = 16/9√16/9 = 4/3_____________x = 25*(4/3 + 4/3 + 4/3) = 25*12/3 = 25*4 = 100 = 10^2 patrat perfect
Ex:15
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