Đề thi online - Phương trình quy về bậc nhất và bậ...

A \(x = 0;\,\,x = 1\)

B \(x = 0;\,\,x = -1\).

C \(x = 0\).

D \(x = 1\).

A \(x =  \pm \dfrac{2}{9}\)

B \(x =  \dfrac{2}{9}\)

C Phương trình vô nghiệm

D \(x =  - \dfrac{2}{9}\)

A \(S = \left\{ {3 - \sqrt {21} ;3 + \sqrt {21} ;-6; 2} \right\}\)

B \(S = \left\{ {3 - \sqrt {21} ;3 + \sqrt {21} ;6; - 2} \right\}\)

C \(S = \left\{ {6; - 2} \right\}\)

D \(S = \left\{ {3 - \sqrt {21} ;3 + \sqrt {21}} \right\}\)

A \(m =  - 3\)

B \(m =  3\)

C \(m =  \pm 3\)

D \(m \in \emptyset \)

A \(\begin{array}{l}
a)\,\,S = \left\{ {0; - 6} \right\}\\
b)\,\,m = 2
\end{array}\)

B \(\begin{array}{l}
a)\,\,S = \left\{ {0; - 6} \right\}\\
b)\,\,m > 2
\end{array}\)

C \(\begin{array}{l}
a)\,\,S = \left\{ {0; - 6} \right\}\\
b)\,\,m < 2
\end{array}\)

D \(\begin{array}{l}
a)\,\,S = \left\{ {0; - 6} \right\}\\
b)\,\,m \ne 2
\end{array}\)

A \( - \frac{1}{8} < m < \frac{1}{2}\)

B \(m \ne 0\)

C \(\frac{1}{8} < m < \frac{1}{2}\)

D \(\left\{ \begin{array}{l}\dfrac{1}{2} > m > \dfrac{{ - 1}}{8}\\m \ne 0\end{array} \right..\)

A \(x = \dfrac{{9 - \sqrt {77} }}{2}\)

B \(x = \dfrac{{9 \pm \sqrt {77} }}{2}\)

C \(x = \dfrac{{-9 \pm \sqrt {77} }}{2}\)

D \(x = \dfrac{{9 + \sqrt {77} }}{2}\)

A \(\begin{array}{l}
a)\,\,S = \left\{ {0; - 5} \right\}\\
b)\,\,S = \left\{ { - 1 \pm \sqrt 5 } \right\}\\
c)\,\,S = \left\{ {\frac{1}{3}} \right\}
\end{array}\)

B \(\begin{array}{l}
a)\,\,S = \left\{ {0; - 5} \right\}\\
b)\,\,S = \left\{ { - 1 \pm \sqrt 5 } \right\}\\
c)\,\,S = \left\{ { \pm \frac{1}{3}} \right\}
\end{array}\)

C \(\begin{array}{l}
a)\,\,S = \left\{ {0; - 5} \right\}\\
b)\,\,S = \left\{ { - 1 \pm \sqrt 5 } \right\}\\
c)\,\,S = \left\{ { - \frac{1}{3}} \right\}
\end{array}\)

D \(\begin{array}{l}
a)\,\,S = \left\{ {0;5} \right\}\\
b)\,\,S = \left\{ { - 1 \pm \sqrt 5 } \right\}\\
c)\,\,S = \left\{ { - \frac{1}{3}} \right\}
\end{array}\)

A \(x =  - 6 + 2\sqrt 7 .\)

B \(x =  - 6 - 2\sqrt 7 .\)

C \(x =  - 6 \pm 2\sqrt 7 .\)

D Phương trình vô nghiệm

A \(m = -\dfrac{16}{{9}}\) 

B \(m = \dfrac{9}{{16}}\) 

C \(m =- \dfrac{9}{{16}}\) 

D \(m = \dfrac{16}{{9}}\)