Question

1/2 log3 (5x-1) - log3 (x+1) = 0

помогите пожалуйста очень нужно

Answer 1

1/2lg3 (5x-1) - lg3 (x+1) = 0 | •2
lg3 (5x-1) - 2lg3 (x+1) = 0
lg3 (5x-1) - lg3 (x+1)^2 = 0
lg3 ((5x-1)/(x+1)^2)=0
(5x-1)/(x+1)^2=1| •(x+1)^2 x не равен -1
5x-1=x^2+2x+1
x^2-3x+2=0
D=1
x1=1 x2=2