Помогите пожалуйста lg(4x)+lgx<=2
lg4x + lgx <= 2</p>
lg4 + lgx + lgx <= 2</p>
2lgx <= 2-2lg2</p>
lgx <= 1-lg2</p>
lgx <=lg10 - lg2</p>
lgx <= lg5</p>
{x <= 5</p>
{x > 0
x€(0; 5]