bpt logarit đưa về cùng cơ số :
1, \(2lg\left[\left(x-1\right)\sqrt{5}\right]>lg\left(x-5\right)+1\)
2, \(log_{\dfrac{1}{2}}\left[log_2\left(3^x+1\right)\right]>-1\)
3, \(log_x\dfrac{3x-1}{x^2+1}>0\)
4, \(\left(0,08\right)^{log_{x-0,5}x}\ge\left(\dfrac{5\sqrt{2}}{2}\right)^{log_{x-0,5}\left(2x-1\right)}\)