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va rog cat mai repede​

Va Rog Cat Mai Repede class=

Răspuns :

 

[tex]\displaystyle\bf\\c)\\\\\\\left(\frac{1}{7} \right)^{\b x}=\frac{2}{98}\\\\\\\left(\frac{1}{7} \right)^{\b x}=\frac{1}{49}\\\\\\\left(\frac{1}{7} \right)^{\b x}=\left(\frac{1}{7} \right)^{\b2}\\\\\\\implies~x=2[/tex]