Câu hỏi trắc nghiệm (10 câu):
-
- A. \(x=\frac{2+3 \sqrt{5}}{7}\)
- B. \(x=\frac{1+3\sqrt{11}}{7}\)
- C. \(x=\frac{ \sqrt{11}}{3}\)
- D. \(x=\frac{-2+6 \sqrt{11}}{7}\)
-
- A. x=4
- B. x=12
- C. x=7
- D. x=8
-
- A. x=1
- B. x=2
- C. x=3
- D. x=4
-
- A. \(S=\{1;-3\}\)
- B. \(S=\varnothing \text { . }\)
- C. \(S=\{-3\}\)
- D. \(S=\{-1;2\}\)
-
- A. \(S=\left\{3\right\} .\)
- B. \(S=\left\{-3 ; \frac{1}{2}\right\} .\)
- C. \(S=\left\{\frac{1}{2}\right\} .\)
- D. \(S=\left\{3 ; \frac{1}{2}\right\} .\)
-
- A. \(S=\{4\} .\)
- B. \(S=\{1;4\} .\)
- C. \(S=\{1\} .\)
- D. \(S=\{-1;4\} .\)
-
- A. \( S=\{-1;1 ; 3\} \text { . }\)
- B. \( S=\{-1 ; 3\} \text { . }\)
- C. \( S=\{1 ; 3\} \text { . }\)
- D. \( S=\{ 3\} \text { . }\)
-
- A. x = 4
- B. \(\left[ \begin{array}{l} x = 0\\ x = 4 \end{array} \right.\)
- C. \(x = 4 + 2\sqrt 2 \)
- D. x = 6
-
- A. \(x = \dfrac{-5}{2}\)
- B. \(x = \dfrac{1}{2}\)
- C. \(x = \dfrac{3}{2}\)
- D. \(x = \dfrac{5}{2}\)
-
- A. x = 1
- B. x = 2
- C. x = 3
- D. x = 4
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