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A.\[V = Sh\]

B. \[V = \frac{1}{2}Sh\]

C. \[V = \frac{1}{3}Sh\]

D. \[V = \frac{1}{6}Sh\]

A.\[\frac{V}{{V'}} = k\]

B. \[\frac{{V'}}{V} = {k^2}\]

C. \[\frac{V}{{V'}} = {k^3}\]

D. \[\frac{{V'}}{V} = {k^3}\]

A.\[\frac{{{V_{S.A'B'C'}}}}{{{V_{S.ABC}}}} = \frac{{SA'}}{{SA}} + \frac{{SB'}}{{SB}} + \frac{{SC'}}{{SC}}\]

B. \[\frac{{{V_{S.ABC}}}}{{{V_{S.A'B'C'}}}} = \frac{{SA'}}{{SA}}.\frac{{SB'}}{{SB}}.\frac{{SC'}}{{SC}}\]

C. \[\frac{{{V_{S.A'B'C'}}}}{{{V_{S.ABC}}}} = \frac{{SA'}}{{SA}} = \frac{{SB'}}{{SB}} = \frac{{SC'}}{{SC}}\]

D. \[\frac{{{V_{S.A'B'C'}}}}{{{V_{S.ABC}}}} = \frac{{SA'}}{{SA}}.\frac{{SB'}}{{SB}}.\frac{{SC'}}{{SC}}\]

A.\[\frac{{{a^3}}}{6}\]

B. \[\frac{{{a^3}}}{3}\]

C. \[\frac{{{a^3}}}{4}\]

D. \[\frac{{{a^3}}}{8}\]

A.\[\frac{{2{a^3}\sqrt 2 }}{3}\]

B. \[\frac{{{a^3}\sqrt 2 }}{6}\]

C. \[\frac{{2{a^3}}}{3}\]

D. \[\frac{{{a^3}\sqrt 2 }}{{12}}\]

A.\[\frac{{{a^3}\sqrt 6 }}{2}\]

B. \[\frac{{{a^3}\sqrt 6 }}{4}\]

C. \[\frac{{{a^3}\sqrt 6 }}{8}\]

D. \[\frac{{3{a^3}\sqrt 6 }}{8}\]

A.\[\frac{1}{3}abc\]

B. \[\frac{1}{9}abc\]

C. \[\frac{1}{6}abc\]

D. \[\frac{2}{3}abc\]

A.\[\frac{{{a^3}\sqrt 3 }}{{27}}\]

B. \[\frac{{{a^3}\sqrt 3 }}{9}\]

C. \[\frac{{{a^3}}}{{27}}\]

D. \[\frac{{{a^3}}}{9}\]

A.\[V = \frac{{7{a^3}}}{2}\]

B. \[V = 14{a^3}\]

C. \[V = \frac{{28{a^3}}}{3}\]

D. \[V = 7{a^3}\]

A.\[\frac{{5{a^3}\sqrt 2 }}{{12}}\]

B. \[\frac{{5{a^3}\sqrt 2 }}{6}\]

C. \[\frac{{5{a^3}\sqrt 2 }}{8}\]

D. \[\frac{{5{a^3}\sqrt 2 }}{{24}}\]

A.\[\frac{{{a^3}\sqrt 3 }}{{12}}\]

B. \[\frac{{{a^3}\sqrt 3 }}{{24}}\]

C. \[\frac{{{a^3}\sqrt 3 }}{6}\]

D. \[\frac{{{a^3}\sqrt 3 }}{8}\]

A.\[\frac{{{a^3}\sqrt 2 }}{6}\]

B. \[\frac{{{a^2}\sqrt 2 }}{2}\]

C. \[\frac{{{a^3}}}{2}\]

D. \[{a^3}\]

A.\[V = \frac{{5{a^3}\sqrt 3 }}{{12}}\]

B. \[V = \frac{{{a^3}\sqrt 3 }}{{12}}\]

C. \[V = \frac{{{a^3}\sqrt 5 }}{{12}}\]

D. \[V = \frac{{{a^3}\sqrt 3 }}{{10}}\]

A.\[\frac{{{a^3}\sqrt 3 }}{{12}}\]

B. \[\frac{{{a^3}\sqrt 2 }}{{24}}\]

C. \[\frac{{{a^3}\sqrt 3 }}{{24}}\]

D. \[\frac{{{a^3}}}{{24}}\]

A.\[{a^3}\sqrt 2 \]

B. \[\frac{{{a^3}\sqrt 3 }}{6}\]

C. \[\frac{{{a^3}\sqrt 2 }}{6}\]

D. \[\frac{{{a^3}\sqrt 2 }}{3}\]Trả lời:

A.\[3\sqrt[3]{2}\]

B. \[3\sqrt[3]{4}\]

C. \(2\sqrt 2 \)

D. \[2\sqrt[3]{4}\]

A.\[k = \frac{{ - 1 + \sqrt 3 }}{2}\]

B. \[k = \frac{{ - 1 + \sqrt 5 }}{2}\]

C. \[k = \frac{{ - 1 + \sqrt 2 }}{2}\]

D. \[k = \frac{{1 + \sqrt 5 }}{4}\]

A.\[V = \frac{{{a^3}}}{2}\]

B. \[V = \frac{{{a^3}}}{6}\]

C. \[V = \frac{{{a^3}\sqrt 3 }}{6}\]

D. \[V = \frac{{{a^3}\sqrt 3 }}{2}\]

A.\[{V_{S.{\kern 1pt} ABC}} = 8\]

B. \[{V_{S.{\kern 1pt} ABC}} = 6\]

C. \[{V_{S.{\kern 1pt} ABC}} = 4\]

D. \[{V_{S.{\kern 1pt} ABC}} = 12\]

A.\[\frac{{{a^3}\sqrt 2 }}{6}\]

B. \[\frac{{{a^3}\sqrt 3 }}{6}\]

C. \[\frac{{{a^3}\sqrt 3 }}{{12}}\]

D. \[\frac{{{a^3}\sqrt 2 }}{{12}}\]

A.\[\frac{3}{8}\]

B. \[\frac{4}{9}\]

C. \(\frac{1}{2}\)

D. \[\frac{5}{9}\]

A.\[r = \frac{{a\sqrt 3 }}{4}\]

B. \[r = \frac{{a\sqrt 3 }}{2}\]

C. \[r = \frac{{a\sqrt 3 }}{3}\]

D. \[r = \frac{{a\sqrt 3 }}{6}\]

A.\[\frac{5}{3}\]

B. \[\frac{2}{3}\]

C. \[\frac{3}{2}\]

D. \[\frac{3}{5}\]

A.3

B.\[2\sqrt 2 \]

C. \[2\sqrt 3 \]

D. 4

A.\[\frac{5}{4}\]

B. \[\frac{4}{3}\]

C. \[\frac{{17}}{{12}}\]

D. \[\frac{7}{6}\]

A.\[\frac{{3{a^3}\sqrt 3 }}{2}\]

B. \[\frac{{{a^3}\sqrt 5 }}{2}\]

C. \[\frac{{{a^3}\sqrt 3 }}{6}\]

D. \[\frac{{{a^3}\sqrt 3 }}{2}\]

A.\[{V_0} = \frac{{2\sqrt 3 }}{9}\]

B. \[{V_0} = \frac{{8\sqrt 3 }}{{21}}\]

C. \[{V_0} = \frac{{2\sqrt 3 }}{7}\]

D. \[{V_0} = \frac{{4\sqrt 3 }}{9}\]

A.\[2\sqrt 6 {a^3}\]

B. \[8{a^3}\]

C. \[\frac{{2\sqrt 6 }}{3}{a^3}\]

D. \[\frac{{7{a^3}}}{{12}}\]

A.\[6{a^3}.\]

B. \[4{a^3}.\]

C. \[2{a^3}.\]

D. \[{a^3}.\]

A.12a

B.6a

C.3a

D.4a

D.a