Bài tập 6.47 trang 192 SBT Toán 10

A. \(1\)      B. \({2^{4038}}\)     C. \({2^{2019}}\)      D. \({4^{4038}}\)

A. \(\left\{ \begin{array}{l}a < 0\\\Delta  > 0\end{array} \right.\)     B. \(\left\{ \begin{array}{l}a > 0\\\Delta  \le 0\end{array} \right.\)

C. \(\left\{ \begin{array}{l}a > 0\\\Delta  < 0\end{array} \right.\)      D. \(\left\{ \begin{array}{l}a > 0\\\Delta  \ge 0\end{array} \right.\)

A. \(2019\)        B. \(2017\)

C. \(2018\)         D. \(2016\)

A. \(P = \dfrac{3}{5}\)       B. \(P =  - \dfrac{4}{5}\) 

C. \(P = \dfrac{{ - 3}}{5}\)        D. \(P = \dfrac{4}{5}\)

A. \(\dfrac{{k\pi }}{2},\,\,k \in \mathbb{Z}\) 

B. \(k\pi ,\,\,k \in \mathbb{Z}\) 

C. \(\dfrac{{k\pi }}{3},\,\,k \in \mathbb{Z}\)

D. \(\dfrac{{k2\pi }}{3},\,\,k \in \mathbb{Z}\)

A. \(b \in \left( { - \infty ;\,\, - 2\sqrt[{}]{3}} \right] \cup \left[ {2\sqrt 3 ;\,\, + \infty } \right)\) 

B. \(b \in \left[ { - 2\sqrt 3 ;\,\,2\sqrt 3 } \right]\)

C. \(b \in \left( { - \infty ;\,\, - 2\sqrt[{}]{3}} \right) \cup \left( {2\sqrt 3 ;\,\, + \infty } \right)\) 

D. \(b \in \left( { - 2\sqrt 3 ;\,\,2\sqrt 3 } \right)\)

A. \(3\)     B. \(5\)     C. \(4\)      D. \(6\)

A. \(S = \left( { - \infty ;\,\, - 1} \right] \cup \left[ {2;\,\, + \infty } \right)\) 

B. \(S = \left( { - 1;\,\,2} \right)\)

C. \(S = \left( { - \infty ;\,\, - 1} \right) \cup \left( {2;\,\, + \infty } \right)\)            

D. \(S = \left[ { - 1;\,\,2} \right)\)

A. \({x^2} + {y^2} - 2x - 2y + 2 = 0\)

B. \({x^2} + {y^2} - 6y + 4 = 0\) 

C. \(2{x^2} + 2{y^2} - 8 = 0\)

D. \(2{x^2} + 2{y^2} - 8x - 2y + 2 = 0\)

A. \(8\)    B. \(9\)    C. \(10\)     D. \(11\)

A. \(m < 0\)      B. \(m > 0\)

C. \(m = 0\)      D. \(m \ne 0\)

A. \(\cos \alpha  = \dfrac{5}{{13}}\)     B. \(\cos \alpha  =  - \dfrac{1}{{13}}\) 

C. \(\cos \alpha  =  - \dfrac{5}{{13}}\)   D. \(\cos \alpha  = \dfrac{1}{{13}}\)

A. \(6\)      B. \(9\)      C. \(5\)        D. \(3\)