0\\\\log_3(7-4x) \leq 1,\; x<\frac{7}{4}\\\\7-4x \leq 3\\\\4x \geq 4\\\\x \geq 1,\; x<\frac{7}{4}\; \to \; 1 \leq x <\frac{7}{4}" alt="y=\sqrt[6]{1-log_3(7-4x)},\\\\1-log_3(7-4x) \geq 0,\; 7-4x>0\\\\log_3(7-4x) \leq 1,\; x<\frac{7}{4}\\\\7-4x \leq 3\\\\4x \geq 4\\\\x \geq 1,\; x<\frac{7}{4}\; \to \; 1 \leq x <\frac{7}{4}" align="absmiddle" class="latex-formula">