Question

log2x-1(3,5x(2)-2,5x)=2

Answer 1

ОДЗ
{2x-1>0⇒2x>1⇒x>0,5
{2x-1≠1⇒2x≠2⇒x≠1
{3,5x²-2,5x>0⇒2,5x(x-1,4)>0⇒x<0 U x>1,4
x∈(1,4;∞)
3,5x²-2,5x=(2x-1)²
3,5x²-2,5x-4x²+4x-1=0
-0,5x²+1,5x-1=0
x²-3x+2=0
x1+x2=3 u x1*x2=2
x1=1 ек удов усл
х2=2