A. -3
B. \(\frac{3}{4}\)
C. \( - \frac{7}{2}\)
D. -5
A. abc = 2020
B. ac = 2020
C. bc = 2020
D. ab = 2020
A. \(V = 2\pi .\)
B. \(V = \pi .\)
C. \(V = \frac{7}{4}\pi .\)
D. \(V = \frac{7}{8}\pi .\)
A. \(\int\limits_0^2 {\frac{x}{{\left( {{x^2} + 1} \right)\ln 2}}{e^{{{\log }_2}\left( {{x^2} + 1} \right)}}dx} = \int\limits_0^{{{\log }_2}5} {\frac{1}{2}{e^u}du} \)
B. \(\int\limits_0^2 {\frac{x}{{\left( {{x^2} + 1} \right)\ln 2}}{e^{{{\log }_2}\left( {{x^2} + 1} \right)}}dx} = - \int\limits_0^{{{\log }_2}5} {\frac{1}{2}{e^u}du} \)
C. \(\int\limits_0^2 {\frac{x}{{\left( {{x^2} + 1} \right)\ln 2}}{e^{{{\log }_2}\left( {{x^2} + 1} \right)}}dx} = \int\limits_0^{{{\log }_2}4} {2{e^u}du} \)
D. \(\int\limits_0^2 {\frac{x}{{\left( {{x^2} + 1} \right)\ln 2}}{e^{{{\log }_2}\left( {{x^2} + 1} \right)}}dx} = \int\limits_0^{{{\log }_2}5} {{e^u}du} \)
A. \(V = \int\limits_1^2 {\left| {{x^2} - 3x + 2} \right|} \,{\rm{d}}x\)
B. \(V = \int\limits_1^2 {{{\left| {{x^2} - 3x + 2} \right|}^2}} \,{\rm{d}}x\)
C. \(V = \pi \int\limits_1^2 {{{\left( {{x^2} - 3x + 2} \right)}^2}} \,{\rm{d}}x\)
D. \(V = \pi \int\limits_1^2 {\left| {{x^2} - 3x + 2} \right|} \,{\rm{d}}x\)
A. S = -4
B. S = 4
C. S = 2
D. S = -2
A. \(MN = 2\sqrt 5 \)
B. MN = 5
C. \(MN = 3\sqrt 5 \)
D. MN = 4
A. - 5x - 3y + 3z - 14 = 0
B. - 10x - 6y + 6z + 15 = 0
C. - 10x - 6y + 6z - 15 = 0
D. \( - 5x - 3y + 3z + \frac{{15}}{2} = 0\)
A. \(\frac{x}{1} = \frac{{y - 1}}{{ - 1}} = \frac{{z + 1}}{2}\)
B. \(\frac{{x - 1}}{1} = \frac{{y - 1}}{{ - 1}} = \frac{{z + 1}}{2}\)
C. \(\frac{x}{1} = \frac{{y - 2}}{{ - 1}} = \frac{{z + 2}}{2}\)
D. \(\frac{x}{1} = \frac{{y - 1}}{1} = \frac{{z + 1}}{2}\)
A. \(\frac{{799}}{{1140}}\)
B. \(\frac{{139}}{{190}}\)
C. \(\frac{{68}}{{95}}\)
D. \(\frac{{27}}{{95}}\)
A. \(\frac{{a\sqrt {21} }}{{21}}\)
B. \(\frac{{2a\sqrt {21} }}{{21}}\)
C. \(\frac{{2a\sqrt 7 }}{7}\)
D. \(\frac{{a\sqrt 7 }}{7}\)
A. 3
B. 1
C. 4
D. 2
A. \(\frac{{3{R^3}}}{2}.\)
B. \(\frac{{3{R^3}}}{4}.\)
C. \(\frac{{{R^3}}}{4}.\)
D. \(\frac{{{R^3}}}{2}.\)
A. \(\frac{5}{{18}}\)
B. \(\frac{{10}}{9}\)
C. \(\frac{5}{9}\)
D. 0
A. \(\frac{2}{3}\)
B. \(\frac{3}{2}\)
C. \(\frac{3}{4}\)
D. \(\frac{4}{3}\)
A. \(C_{12}^2\)
B. \(A_{12}^2\)
C. 122
D. 212
A. 16
B. 19
C. -1458
D. -30
A. x = 2
B. x = 3
C. x = 4
D. x = 5
A. 30
B. 10
C. 15
D. 20
A. \(y' = e\left( {2{\rm{x}} + 1} \right){e^{2{\rm{x}} + 1}}\)
B. \(y' = e\left( {2{\rm{x}} + 1} \right){e^{2{\rm{x}}}}\)
C. \(y' = 2{e^{2x + 1}}\)
D. \(y' = {e^{2x + 1}}\)
A. 10
B. 15
C. 20
D. 30
A. \(50\pi\)
B. \(45\pi\)
C. \(40\pi\)
D. \(30\pi\)
A. \(64 \pi\)
B. \(48 \pi\)
C. \(92 \pi\)
D. \(16 \pi\)
A. (-1;0)
B. \(\left( { - \infty ; - 1} \right)\)
C. (0;1)
D. \(\left( {0; + \infty } \right)\)
A. \(D = \left( { - 1; + \infty } \right)\)
B. \(D = \left( { - \frac{4}{3}; + \infty } \right)\)
C. \(D = \left[ { - 1; + \infty } \right)\)
D. \(D = \left[ {1; + \infty } \right)\)
A. \(20 \pi\)
B. \(30 \pi\)
C. \(40 \pi\)
D. \(10 \pi\)
A. \(y = {x^3} - 3x\)
B. \(y = - {x^3} + 3x\)
C. \(y = {x^4} - 2{x^2}\)
D. \(y = - {x^4} + 2{x^2}\)
A. y = 1
B. x = -2
C. x = 2
D. y = -1
A. 1
B. 2
C. 3
D. 4
A. -1,5
B. 0,5
C. 1,5
D. -0,5
A. 27
B. 23
C. 21
D. 25
A. 9
B. 27
C. 3
D. \(3\sqrt 3 \)
A. \(\overrightarrow n = \left( {3; - 1;2} \right)\)
B. \(\overrightarrow n = \left( {3;1;2} \right)\)
C. \(\overrightarrow n = \left( {3;2; - 7} \right)\)
D. \(\overrightarrow n = \left( { - 3;1;2} \right)\)
A. \(d:\left\{ \begin{array}{l} x = 3 - 2t\\ y = - 1 + 5t\\ z = t \end{array} \right.\)
B. \(d:\left\{ \begin{array}{l} x = 3 - t\\ y = - 1 - t\\ z = 4t \end{array} \right.\)
C. \(d:\left\{ \begin{array}{l} x = 3 + t\\ y = - 1 - 6t\\ z = 3t \end{array} \right.\)
D. \(d:\left\{ \begin{array}{l} x = 3 - 3t\\ y = - 1 + 4t\\ z = 5t \end{array} \right.\)
A. 30o
B. 45o
C. 60o
D. 90o
A. 2
B. 9
C. 54
D. 201
A. \(D = \left[ {\frac{{ - 3 - \sqrt {17} }}{2}; - 1} \right) \cup \left[ {\frac{{ - 3 + \sqrt {17} }}{2};1} \right)\)
B. \(D = \left( { - \infty ; - 3} \right) \cup \left( { - 1;1} \right)\)
C. \(D = \left( { - \infty ;\frac{{ - 3 - \sqrt {17} }}{2}} \right] \cup \left( { - 1;\frac{{ - 3 + \sqrt {17} }}{2}} \right]\)
D. \(D = \left( { - \infty ; - 3} \right] \cup \left[ {1; + \infty } \right)\)
A. 1
B. 2
C. 3
D. 0
A. 2 < x < 3
B. 1 < x < 2
C. 2 < x < 5
D. - 4 < x < 3
A. \(\frac{{12\pi {a^2}}}{{\sqrt {10} }}\)
B. \(\frac{{4\pi {a^2}}}{{\sqrt {10} }}\)
C. \(\frac{{6\pi {a^2}}}{{\sqrt {10} }}\)
D. \(\frac{{10\pi {a^2}}}{{\sqrt {10} }}\)
A. \(I = 2\int {{t^6}dt} \)
B. \(I = 2\int {{t^5}dt} \)
C. \(I = \frac{1}{2}\int {{t^6}dt} \)
D. \(I = \frac{1}{2}\int {{t^5}dt} \)
A. \(S=\int\limits_0^{\frac{3}{2}} {\left( {3{x^2} - 2{x^3}} \right)} dx\)
B. \(S= \pi \int\limits_0^{\frac{3}{2}} {\left( {3{x^2} - 2{x^3}} \right)} dx\)
C. \(S=\int\limits_0^{\frac{3}{2}} {\left( {2{x^3} - 3{x^2}} \right)} dx\)
D. \(S=\pi \int\limits_0^{\frac{3}{2}} {\left( {2{x^3} - 3{x^2}} \right)} dx\)
A. \({\rm{ 2}}\sqrt 7 .\)
B. \({\rm{ 2}}\sqrt {14} .\)
C. \(\sqrt 7 .\)
D. \(\sqrt {14} .\)
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