Question

Помогите решить 4 задания!! все во вложении! 

24acd2f2bce9ce52c00d555228b39300.docx

Answer 1

1) $left { {{x^2-9 geq 0} atop {-x geq 0}} right. \ left { {{x leq -3; x geq 3} atop {x leq 0}} right. \ D(y): x leq -3$

2) $left { {{-x^2-10x+1 leq 1-4x} atop {x^2+2x-44 leq 4x+4}} right. \ left { {{-x^2-6x leq 0} atop {x^2-2x-48 leq 0}} right. \ left { {{x(x+6) geq 0} atop {(x-8)(x+6) leq 0}} right. \ left { {{x leq -6; x geq 0} atop {-6 leq x leq 8}} right. \ xin(-6)cup[0; 8]$

3) $left { {{-x^2+14x-38 geq x+4} atop {-x^2+5x-3 geq -x-3}} right. \ left { {{x^2-13x+42 leq 0} atop {x^2-6x leq 0}} right. \ left { {{(x-6)(x-7) leq 0} atop {x(x-6) leq 0}} right. \ left { {{6 leq x leq 7} atop {0 leq x leq 6}} right. \ x=6$

4) $x^2-3x+2 geq 0 \ x geq 0 \ 3-x>0$

$1 leq x leq 2 \ x geq 0 \ x<3$

$1 leq x leq 2$