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  5. 請問這題怎麼算
Mathematics
Senior High
Ivy
Ivy

請問這題怎麼算

12. 設 a 為實數,對任意實數æ,不等式-(x+1)²<ax-(a竿1)<x²恆成立,試求a的範圍。 -(x+2x+1)<ax-a+<x² -x-2x\<ax-ax X+(a+2)x-a20恆成立 {120 453 -81√64-16--8±√48 2 = -4±255-4-3.2=-72 _4+4.86-4+32 45 4+253 A-2-2√250<-4+2√3 -0.8 WD-4-2√3<<-4+2√3
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