Bài tập 9 trang 129 SGK Hình học 12 NC

A. \(2\)                                        B. \( - 2\)

C. \(\frac{3}{2}\)                        D. \( - \frac{3}{2}\)

A. \(V = \pi \)

B. \(V = \frac{{4\sqrt 3 }}{3}\)                        

C. \(V = 3\sqrt 3 \)

D. \(V = \sqrt 3 \)

A. \(\frac{1}{2}\)                        B. \(\frac{{\sqrt 3 }}{2}\)

C. \(\frac{1}{{2\sqrt 2 }}\)         D. \(\sqrt {\frac{2}{3}} \)

A. \(0,014\)                                 B. \(0,012\)

C. \(0,128\)                                 D. \(0,035\)

A. \(\frac{{x - 3}}{4} = \frac{{y + 1}}{1} = \frac{{z - 2}}{6}\)

B. \(\frac{{x - 3}}{{ - 4}} = \frac{{y + 1}}{1} = \frac{{z - 2}}{{ - 6}}\)

C. \(\frac{{x + 1}}{4} = \frac{y}{{ - 1}} = \frac{{z - 4}}{6}\)

D. \(\frac{{x - 1}}{4} = \frac{y}{{ - 1}} = \frac{{z + 4}}{6}\)

A. \(V = \frac{{\sqrt 3 {a^3}}}{6}\)

B. \(V = \frac{{4{a^3}}}{3}\)

C. \(V = \frac{{\sqrt 3 {a^3}}}{2}\)

D. \(V = 4{a^3}\)

A. \(R = a\sqrt 2 \)

B. \(R = 2a\sqrt 2 \)

C. \(R = 2a\)

D. \(R = a\)

A. \(V = 2\left( {\pi  + 1} \right)\)

B. \(V = 2\pi \left( {\pi  + 1} \right)\)

C. \(V = 2{\pi ^2}\)

D. \(V = 2\pi \)

A. \(\frac{9}{{7\sqrt 2 }}\)         B. \(\frac{9}{7}\)

C. \(\frac{9}{{14}}\)                   D. \(\frac{9}{{\sqrt 2 }}\)

A. \({\left( {x + 1} \right)^2} + {\left( {y + 2} \right)^2} + {\left( {z - 1} \right)^2} = 9\)

B. \({\left( {x - 1} \right)^2} + {\left( {y - 2} \right)^2} + {\left( {z + 1} \right)^2} = 9\)

 C. \({\left( {x + 1} \right)^2} + {\left( {y + 2} \right)^2} + {\left( {z - 1} \right)^2} = 3\)

D. \({\left( {x - 1} \right)^2} + {\left( {y - 2} \right)^2} + {\left( {z + 1} \right)^2} = 3\)

A. \(9{a^2}\pi \)

B. \(\frac{{27\pi {a^2}}}{2}\)

C. \(\frac{{9\pi {a^2}}}{2}\)

D. \(\frac{{13\pi {a^2}}}{6}\)

A. \(\frac{{a\sqrt {21} }}{7}\)

B. \(\frac{{a\sqrt {15} }}{7}\)

C. \(\frac{{a\sqrt {21} }}{3}\)

D. \(\frac{{a\sqrt {15} }}{3}\)