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As doriiiii si euu un raspuuns rapiid!! Multumeeesc!


As Doriiiii Si Euu Un Raspuuns Rapiid Multumeeesc class=

Răspuns :

3^ (x+1)+3^x=8
3^x *(3+1)=8
4*3^x=8
3^x=2
x=logaritm in baza 3 din 2

[2 ^ (x-1)] * (2+2²+1)=56
7*2^(x-1)=56
 2^ (x-1)=8=2^3
x-1=3
x=4