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m≤x2−2x⇒m≤min(x2−2x)" role="presentation" style="font-size: 12.8px; display: inline; position: relative;">m≤x2−2x⇒m≤min(x2−2x)m≤x2−2x⇒m≤min(x2−2x) trên (0;+∞)" role="presentation" style="font-size: 12.8px; display: inline; position: relative;">(0;+∞)(0;+∞)Sử dụng MODE 7:f(x)=x2−2x" role="presentation" style="font-size: 12.8px; display: inline; position: relative;">f(x)=x2−2xf(x)=x2−2xStart = 0End = 10 Step = 1

m≤x2−2x⇒m≤min(x2−2x)" role="presentation" style="font-size: 12.8px; display: inline; position: relative;">m≤x2−2x⇒m≤min(x2−2x)m≤x2−2x⇒m≤min(x2−2x) trên (0;+∞)" role="presentation" style="font-size: 12.8px; display: inline; position: relative;">(0;+∞)(0;+∞)Sử dụng MODE 7:f(x)=x2−2x" role="presentation" style="font-size: 12.8px; display: inline; position: relative;">f(x)=x2−2xf(x)=x2−2xStart = 0End = 10 Step = 1(Có thể chia khoảng khác để tìm min)⇒min(x2−2x)=−1" role="presentation" style="font-size: 12.8px; display: inline; position: relative;">⇒min(x2−2x)=−1⇒min(x2−2x)=−1 tại x=1" role="presentation" style="font-size: 12.8px; display: inline; position: relative;">x=1x=1⇒m≤−1" role="presentation" style="font-size: 12.8px; display: inline; position: relative;">⇒m≤−1