Question

Решите пожалуйста примеры 1)x^-1<=0  2)x^-9=>0 3)x^+x-6<=0

Answer 1

$x^2-1 leq 0, \ (x+1)(x-1) leq 0, \ (x+1)(x-1) = 0, \ x_1=-1, x_2=1, \ -1 leq x leq 1, \ xin[-1;1]$

$x^2-9 geq 0, \ (x+3)(x-3) geq 0, \ (x+3)(x-3) = 0, \ x_1=-3, x_2=3, \ left [ {{x leq -3,} atop {x geq 3;}} right. \ x =in(-infty;-3]cup[3;+infty).$

$x^2+x-6 leq 0, \ x^2+x-6 = 0, \ x_1=-3, x_2=2, \ -3 leq x leq 2, \ xin[-3;2].$