0,\; 11x<6,\; x<\frac{6}{11}\\\\x\in (-\infty,\frac{6}{11})
" alt="f(x)=\frac{4x}{\sqrt{6-11x}}\\\\ \left \{ {{6-11x\ne 0} \atop {6-11x \geq 0}} \right. \; \to \; 6-11x>0,\; 11x<6,\; x<\frac{6}{11}\\\\x\in (-\infty,\frac{6}{11})
" align="absmiddle" class="latex-formula">