A.\[dy = {\left( {{x^2} + 2x} \right)^\prime }dx\]
B. \[dx = {\left( {{x^2} + 2x} \right)^\prime }dy\]
C. \[dy = \left( {{x^2} + 2x} \right)dx\]
D. \[dy = \frac{1}{{{x^2} + 2x}}dx\]
A.\[y'' = 0\]
B. \[y'' = \frac{1}{{{{\left( {x - 2} \right)}^2}}}\]
C. \[y'' = - \frac{4}{{{{\left( {x - 2} \right)}^3}}}\]
D. \[y'' = \frac{4}{{{{\left( {x - 2} \right)}^3}}}\]
A.\[y''' = 12x\left( {{x^2} + 1} \right)\]
B. \[y''' = 24x\left( {{x^2} + 1} \right)\]
C. \[y''' = 24x\left( {5{x^2} + 3} \right)\]
D. \[y''' = - 12x\left( {{x^2} + 1} \right)\]
A.\[y'' = \frac{1}{{\left( {2x + 5} \right)\sqrt {2x + 5} }}\]
B.\[y'' = \frac{1}{{\sqrt {2x + 5} }}\]
C. \[y'' = - \frac{1}{{\left( {2x + 5} \right)\sqrt {2x + 5} }}\]
D. \[y'' = - \frac{1}{{\sqrt {2x + 5} }}\]
A.\[y'' = - \frac{{2\sin x}}{{{{\cos }^3}x}}\]
B. \[y'' = \frac{1}{{{{\cos }^2}x}}\]
C. \[y'' = - \frac{1}{{{{\cos }^2}x}}\]
D. \[y'' = \frac{{2\sin x}}{{{{\cos }^3}x}}\]
A.M=0.
B.M=20.
C.M=40.
D.M=100.
A.\[\left[ { - 1;2} \right]\]
B. \[\left( { - \infty ;0} \right]\]
C. \[\left\{ { - 1} \right\}\]
D. \[\emptyset \]
A.\[y' = \sin \left( {x + \frac{\pi }{2}} \right)\]
B. \[y'' = \sin \left( {x + \pi } \right)\]
C. \[y''' = \sin \left( {x + \frac{{3\pi }}{2}} \right)\]
D. \[{y^{\left( 4 \right)}} = \sin \left( {2\pi - x} \right)\]
A.\[x = \frac{\pi }{2}\]
B. \[x = 0\]hoặc \[x = \frac{\pi }{6}\]
C. \[x = 0\]hoặc\[x = \frac{\pi }{3}\]
D. \[x = 0\]hoặc \[x = \frac{\pi }{2}\]
A.\[4y - y'' = 0\]
B. \[4y + y'' = 0\]
C. \[y = y'\tan 2x\]
D. \[{y^2} = {\left( {y'} \right)^2} = 4\]
A.Chỉ (I)
B.Chỉ (II) đúng
C.Cả hai đều đúng
D.Cả hai đều sai
A.0
B.1
C.−2
D.5
A.\[x \in \left( {1; + \infty } \right).\]
B. \[x \in \left( { - \infty ;1} \right) \setminus \left\{ 0 \right\}.\]
C. \[x \in \left( { - 1;1} \right).\]
D. \[x \in \left( { - 2;2} \right).\]
A.\[\frac{1}{{\cos x}}\]
B. \[ - \frac{1}{{\cos x}}\]
C. \[\cot x\]
D. \[\tan x\]
A.\[{f^{\left( {10} \right)}}\left( 1 \right) = 0\]
B. \[{f^{\left( {10} \right)}}\left( 1 \right) = 10a + b\]
C. \[{f^{\left( {10} \right)}}\left( 1 \right) = 5a\]
D. \[{f^{\left( {10} \right)}}\left( 1 \right) = 10a\]
A.−cosx
B.sinx
C.−sinx
D.cosx
A.\[12\,m/{s^2}\]
B. \[8\,m/{s^2}\]
C. \[7\,m/{s^2}\]
D. \[6\,m/{s^2}\]
A.\[{y^3}.y'' + 1 = 0\]
B. \[{y^2}.y'' - 1 = 0\]
C. \[3{y^2}.y'' + 1 = 0\]
D. \[2{y^3}.y'' + 3 = 0\]
A.\[{y^{\left( 4 \right)}} = - 2048\cos 8x + 8\cos 2x\]
B. \[{y^{\left( 4 \right)}} = 2048\cos 8x - 8\cos 2x\]
C. \[{y^{\left( 4 \right)}} = 1024\cos 16x + 4\cos 4x\]
D. \[{y^{\left( 4 \right)}} = 2048\cos 8x - 4\cos 4x\]
A.\[{y^{\left( n \right)}} = \frac{{{2^n}.{a^n}.n!}}{{{{\left( {ax + b} \right)}^{n + 1}}}}\]
B. \[{y^{\left( n \right)}} = \frac{{{{\left( { - 1} \right)}^n}{a^n}n!}}{{{{\left( {x + 1} \right)}^{n + 1}}}}\]
C. \[{y^{\left( n \right)}} = \frac{{{{\left( { - 1} \right)}^n}.n!}}{{{{\left( {ax + b} \right)}^{n + 1}}}}\]
D. \[{y^{\left( n \right)}} = \frac{{{{\left( { - 1} \right)}^n}.{a^n}.n!}}{{{{\left( {ax + b} \right)}^{n + 1}}}}\]
A.\[{y^{\left( 4 \right)}} = \frac{{7.4!}}{{{{\left( {x - 3} \right)}^5}}} - \frac{{5.4!}}{{{{\left( {x - 2} \right)}^5}}}\]
B. \[{y^{\left( 4 \right)}} = \frac{{5.4!}}{{{{\left( {x - 3} \right)}^5}}} - \frac{{2.4!}}{{{{\left( {x - 2} \right)}^5}}}\]
C. \[{y^{\left( 4 \right)}} = \frac{{5.4!}}{{{{\left( {x - 2} \right)}^5}}} - \frac{{7.4!}}{{{{\left( {x - 3} \right)}^5}}}\]
D. \[{y^{\left( 4 \right)}} = \frac{7}{{{{\left( {x - 3} \right)}^4}}} - \frac{5}{{{{\left( {x - 2} \right)}^4}}}\]
A.6
B.2020
C.2021
D.0
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