Question

Найдите область определения функции:
y=√2-x+√x^2-2x-3

Answer 1

$y=sqrt{2-x}+sqrt{x^2-2x-3}\\OOF:; ; left { {{2-x geq 0} atop {x^2-2x-3 geq 0}} right. ; left { {{x leq 2} atop {(x+1)(x-3) geq 0}} right. ; left { {{x leq 2} atop {xin (-infty ,-1, ]cup [, 3,+infty )}} right. ; Rightarrow \\xin (-infty ,-1, ]$