0\; ,\\\\5>4x\; ,\\\\4x<5\; ,\\\\x<\frac{5}{4}\; ,\\\\x<1,25\; ,\\\\x\in (-\infty ;\, 1,25)\\\\Ovet:\; \; naibolshee\; celoe\; \; x=1\; ." alt="y=\frac{4x+1}{\sqrt{-4x+5}}\\\\OOF:\; \; \left \{ {{\sqrt{-4x+5}\ne 0}} \atop {-4x+5\geq 0}} \right. \; \; \; \Rightarrow \quad -4x+5>0\; ,\\\\5>4x\; ,\\\\4x<5\; ,\\\\x<\frac{5}{4}\; ,\\\\x<1,25\; ,\\\\x\in (-\infty ;\, 1,25)\\\\Ovet:\; \; naibolshee\; celoe\; \; x=1\; ." align="absmiddle" class="latex-formula">