[tex]\displaystyle\bf\\y=\frac{6}{\sqrt{6-5x-x^{2} } } \\\\\\6-5x-x^{2} > 0\\\\x^{2}+5x-6 < 0\\\\(x-1)(x+6) < 0\\\\\\+ + + + + (-6) - - - - - (1) + + + + + \\\\\\Otvet \ : \ D(y)=(-6 \ ; \ 1)[/tex]