Question

помогите пожалуйста 20.1 хоть до 6 прошу пожалуйста​

Answer 1

$1)\; \; \left \{ {{x^2-4\leq 0} \atop {3x-2<0}} \right. \; \left \{ {{(x-2)(x+2)\leq 0} \atop {3x<2}} \right.\; \left \{ {{x\in [-2,2\, ]} \atop {x<\frac{2}{3}}} \right. \; \; \to \; \; x\in [-2,\frac{2}{3})\\\\\\2)\; \; \left \{ {{x^2-9\leq 0} \atop {2x-5<0}} \right.\; \left \{ {{(x-3)(x+3)\leq 0} \atop {2x<5}} \right. \; \left \{ {{x\in [-3,3\, ]} \atop {x<2,5}} \right.\; \; \to \; \; x\in [-3;\, 2,5)$

$3)\; \; \left \{ {{x^2-9>0} \atop {3x-2\geq 0}} \right.\; \left \{ {{(x-3)(x+3)>0} \atop {3x\geq 2}} \right.\; \left \{ {{x\in (-\infty ,-3)\cup (3,+\infty )} \atop {x\geq \frac{2}{3}}} \right. \; \; \to \; x\in (3,+\infty )$