Ответы на вопрос:
а)
5} \atop {x>2}} \right." class="latex-formula" id="TexFormula2" src="https://tex.z-dn.net/?f=%5Cleft%20%5C%7B%20%7B%7Bx%3E5%7D%20%5Catop%20%7Bx%3E2%7D%7D%20%5Cright." title="\left \{ {{x>5} \atop {x>2}} \right.">
∈ +∞
б) 2} \atop {1,4 + x>1,5} \right." class="latex-formula" id="TexFormula6" src="https://tex.z-dn.net/?f=%5Cleft%20%5C%7B%20%7B%7B5-2x%20%3E2%7D%20%5Catop%20%7B1%2C4%20%2B%20x%3E1%2C5%7D%20%5Cright." title="\left \{ {{5-2x >2} \atop {1,4 + x>1,5} \right.">
\frac{1}{10} }} \right." class="latex-formula" id="TexFormula8" src="https://tex.z-dn.net/?f=%5Cleft%20%5C%7B%20%7B%7Bx%3C%5Cfrac%20%7B3%7D%20%7B2%7D%20%7D%20%5Catop%20%7Bx%3E%20%5Cfrac%7B1%7D%7B10%7D%20%7D%7D%20%5Cright." title="\left \{ {{x<\frac {3} {2} } \atop {x> \frac{1}{10} }} \right.">
∈
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