lg(2)x - 2lgx + 1 = 0

Question

lg(2)x - 2lgx + 1 = 0

Answer 1

Пусть lgx=t, тогда
t^2 - 2t + 1 = 0
D= b^2 - 4 ac= 0
X= 2/2=1
Lgx=1
Lgx=lg10
X=10