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log in baza 1/2 din x+1 sa fie =3

Răspuns :

(1/2)^3=x+1 => 1/8=x+1 =>x=1/8-1=-7/8
c.E.
x+1>0...x>-1
rezolvare
(1/2)³=x+1
1/8=x+1
x=1/8-1
x=-7/8>-1
x=-7/8


verificare
log in baza (1/2) din (1/8)=3 adevarat pt ca (1/2)³=1/8, bine rezolvat