Trắc nghiệm Khoảng cách có đáp án (Vận dụng) !!

A. $\frac{5{\mathrm{a}}^5}{3}$

B. $\frac{{\mathrm{a}}^2}{2}$

C. $\frac{3{\mathrm{a}}^2}{4}$

D. $\frac{3{\mathrm{a}}^2}{2}$

A. $\frac{\mathrm{a}\sqrt{66}}{22}$

B. $2\mathrm{a}\sqrt{66}$

C. $\frac{\mathrm{a}\sqrt{66}}{11}$

D. $\frac{\mathrm{a}\sqrt{66}}{44}$

A. $\frac{\mathrm{a}\sqrt{21}}{14}$

B. $\frac{\mathrm{a}\sqrt{21}}{7}$

C. $\frac{3\mathrm{a}\sqrt{7}}{14}$

D. $\frac{3\mathrm{a}\sqrt{7}}{7}$

A. $\frac{2\mathrm{a}\sqrt{15}}{5}$

B. $\frac{9\mathrm{a}\sqrt{15}}{10}$

C. $\frac{9\mathrm{a}\sqrt{15}}{20}$

D. $\frac{\mathrm{a}\sqrt{15}}{5}$

A. $\frac{2\mathrm{a}\sqrt{3}}{5}$

B. $\frac{2\mathrm{a}\sqrt{3}}{15}$

C. $\frac{\mathrm{a}\sqrt{3}}{15}$

D. $\frac{3\mathrm{a}\sqrt{3}}{5}$

A. a

B. 2a

C. $\frac{\mathrm{a}}{2}$

D. $\frac{\mathrm{a}}{3}$

A. $\frac{12\mathrm{a}\sqrt{3}}{5}$

B. $\frac{3\mathrm{a}\sqrt{3}}{5}$

C. $\frac{2\mathrm{a}\sqrt{3}}{5}$

D. $\frac{5\mathrm{a}\sqrt{3}}{3}$

A. $\frac{\mathrm{a}\sqrt{21}}{7}$

B. $\frac{\mathrm{a}\sqrt{3}}{7}$

C. $\frac{\mathrm{a}\sqrt{7}}{7}$

D. $\frac{\mathrm{a}\sqrt{17}}{7}$

A. $\frac{2\mathrm{a}\sqrt{13}}{13}$

B. $\frac{2\mathrm{a}\sqrt{78}}{13}$

C. $\frac{\mathrm{a}\sqrt{13}}{13}$

D. $\frac{\mathrm{a}\sqrt{78}}{13}$

A. $\frac{4\mathrm{a}\sqrt{13}}{91}$

B. $\frac{\mathrm{a}\sqrt{165}}{91}$

C. $\frac{4\mathrm{a}\sqrt{1365}}{91}$

D. $\frac{\mathrm{a}\sqrt{135}}{91}$