Xét \[\begin{array}{l} x^{2}-4 x+4 = 0 \Leftrightarrow x = 2 \end{array}\]
Bảng xét dấu
Vậy tập nghiệm là \[S=\mathbb{R} \backslash\{2\}\]
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XEM GIẢI BÀI TẬP SGK TOÁN 10 - TẠI ĐÂY
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Tìm tập nghiệm S của bất phương trình x2-4x+4>0 là:
A.S=R\{2}
B.S=R
C.S=[2;+∞]
D.S=R\{-2}
Đáp án và lời giải
Đáp án:A
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