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Salut lg (y-1) =0 y=10 ? poate sa-mi explice cineva multumesc!

Răspuns :

   
lg(y - 1) = 0
y - 1 = 10^0
y - 1 = 1
y = 1 + 1
y = 2  



10^0=y-1
1=y-1
1+1=y
2+y
y=2
as simple as that!!


probabil confunzi solutia cu baza???