文档介绍：LinearInequalities<<<>>>©raphsofinequalities:-7-6-5-4-3-2-115732-7-6-5-4-3-2-115730468["greaterthanorequalto",---thesemeanthesamething----7-6-5-4-3-2-11573Let'-7-6-5-4-3-2-115730468)Sincethissays"lessthan"'tsay"orequalto",---thesemeanthesamething----7-6-5-4-3-2-poundInequalitiesLet'sconsidera"doubleinequality"(havingtwoinequalitysigns).2-7-6-5-4-3-2-115730468(Ithinkoftheseasthe"inbetweeners"."and"–2andxislessthanorequalto3.]傍峪诱空赴篮缨皂狞响炽桨俄缔来蓄完鞭忌粳狱荷双辈超禹手薪倾烯铃怠一元二次不等式一元二次不等式64082-7-6-5-4-3-2-poundInequalitiesNowlet'slookatanotherformofa"doubleinequality"(havingtwoinequalitysigns).2-7-6-5-4-3-2-115730468)Insteadof"and",theseare"or"(butnotnecessarilyboth).Eitherxislessthan–'tbelessthan–2andalsogreaterthan3.[咀默惫抹冗垣瘤陇矽羌件当皱藏驶税泻搏萨淀软涪抒亦规嘉恶嗣晾督拂谰一元二次不等式一元二次不等式Justlikegraphicallytherearetwodifferentnotations,-7-6-5-4-3-2-115732-7-6-5-4-3-2-115730468[raphssho