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不等式 ∣x∣<1\left|x\right|<1∣x∣<1 を解け。
−1<x<1-1<x<1−1<x<1
x<−1,1<xx<-1,1<xx<−1,1<x
x<±1x<\pm1x<±1
x<1x<1x<1
不等式 ∣x∣>2\left|x\right|>2∣x∣>2 を解け。
−2<x<2-2<x<2−2<x<2
x<−2,2<xx<-2,2<xx<−2,2<x
x>±2x>\pm2x>±2
x>2x>2x>2
不等式 ∣x∣≧2\left|x\right|≧2∣x∣≧2 を解け。
−2≦x≦2-2≦x≦2−2≦x≦2
x≦−2,2≦xx≦-2,2≦xx≦−2,2≦x
x≧±2x≧\pm2x≧±2
x≧2x≧2x≧2
不等式 ∣x∣<3\left|x\right|<3∣x∣<3 を解け。
−3<x<3-3<x<3−3<x<3
x<−3,3<xx<-3,3<xx<−3,3<x
x<±3x<\pm3x<±3
x<3x<3x<3
不等式 ∣x∣>2\left|x\right|>\sqrt{2}∣x∣>2 を解け。
−2<x<2-\sqrt{2}<x<\sqrt{2}−2<x<2
x<−2,2<xx<-\sqrt{2},\sqrt{2}<xx<−2,2<x
x>±2x>\pm\sqrt{2}x>±2
x>2x>\sqrt{2}x>2
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