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2^x+1+2^x=12 (ecuatie exponentiala)

Răspuns :

[tex] 2^{x+1}+2^x=12 \\ 2^x*2+2^x=12 \\ 2^x(2+1)=12 \\ 2^x=4 \\ 2^x=2^2 [/tex]
x=2