Răspunsuri

2014-07-01T15:22:33+03:00
Log₇(x²+8)=log₇6x⇔x²+8=6x
x²-6x+8=0
x₁2=(6+-√36-32)/4=(6+-2)/4
x₁=2, x₂=1
325..........130%
x................100 %
x=325*100/130=250 lei