Question

Найдите область определения функции(срочно надо)
7.24 а и б

Answer 1

$a) left { {{x-12 geq 0} atop {x^2-1 neq 0}} right. left { {{x geq 12} atop {x^2neq 1}} right. left { {{x geq 12} atop {xneq б1}} right.$
Ответ: [12;+бесконечность)

$b) left { {{-x^2-7x+8 geq 0} atop {x+9>0} right. left { {{x^2+7x-8 leq 0} atop {x+9>0} right. left { {{x^2-x+8x-8 leq 0} atop {x>-9} right. left { {{x(x-1)+8(x-1) leq 0} atop {x>-9} right.\ \ left { {{(x-1)(x+8) leq 0} atop {x>-9} right. left { {{x=[-8;1]} atop {x>-9} right.$
Ответ: [-8; 1]