A. \(\sqrt[n]{{{a^m}}} = {a^{\frac{m}{n}}}\)
B. \(\sqrt[n]{{{a^m}}} = {a^{\frac{n}{m}}}\)
C. \({a^m}.{a^n} = {a^{m.n}}\)
D. \({a^{m - n}} = {a^m} - {a^n}\)
A.
\({\log _a}bc = {\log _a}b + {\log _a}c\)
B.
\({\log _a}\frac{b}{c} = {\log _a}b - {\log _a}c\)
C. \({\log _{{a^\alpha }}}b = \alpha {\log _a}b\)
D. \({\log _a}{b^\alpha } = \alpha {\log _a}b\)
A. 19
B. \(\frac{{19}}{4}\)
C. \(\frac{4}{{19}}\)
D. 4
A. \(y' = \frac{5}{4}{(3x + 5)^{\frac{1}{4}}}\)
B. \(y' = \frac{{15}}{4}{(3x + 5)^{\frac{1}{4}}}\)
C. \(y' = \frac{5}{4}{(3x + 5)^{\frac{9}{4}}}\)
D. \(y' = \frac{{15}}{4}{(3x + 5)^{\frac{9}{4}}}\)
A. \(y' = {2019^x}\)
B. \(y' = x{.2019^{x - 1}}\)
C. \(y' = {2019^x}.\ln 2019\)
D. \(y' = \frac{{{{2019}^x}}}{{\ln 2019}}\)
A. \(y = {\log _{\frac{1}{3}}}x\)
B. \(y = {\log _{\frac{{\sqrt 5 }}{2}}}x\)
C. \(y = {\log _{\frac{\pi }{4}}}x\)
D. \(y = {\log _{\frac{e}{3}}}x\)
A. \({x_1} = 1;{x_2} = 2\)
B. \({x_1} = - 1;{x_2} = 2\)
C. \({x_{1,2}} = \frac{{3 \pm \sqrt {17} }}{2}\)
D. \({x_1} = - 1;{x_2} = - 2\)
A. \({x_1} = 1;{x_2} = - 3\)
B. x = 1
C. \({x_1} = - 1;{x_2} = 3\)
D. Vô nghiệm
A. \({x^{\frac{6}{5}}}\)
B. \({x^{\frac{{31}}{{30}}}}\)
C. \({x^{\frac{{11}}{{10}}}}\)
D. \({x^{\frac{{14}}{{15}}}}\)
A. \(A = \sqrt[4]{a}\)
B. \(A = \sqrt[4]{b}\)
C. \(A = \sqrt[4]{{ab}}\)
D. \(A = \sqrt[{}]{{ab}}\)
A. \({\log _6}45 = \frac{{m + 2mn}}{{mn + n}}\)
B. \({\log _6}45 = \frac{{m + 2mn}}{{mn}}\)
C. \({\log _6}45 = \frac{{2{m^2} - 2mn}}{{mn}}\)
D. \({\log _6}45 = \frac{{2{m^2} - 2mn}}{{mn + m}}\)
A. D = (-1;1)
B. \(D = R\backslash \left\{ { \pm 1} \right\}\)
C. D = R
D. \(D = \left( { - \infty ; - 1} \right) \cup (1; + \infty )\)
A. D = R
B. \(D = R\backslash \left\{ { - 1;4} \right\}\)
C. D = (-1;4)
D. \(D = ( - \infty ; - 1) \cup (4; + \infty )\)
A. \(y' = {e^{3x}} + \frac{1}{{(x - 2)\ln 3}}\)
B. \(y' = 3{e^{3x}} + \frac{1}{{(x - 2)\ln 3}}\)
C. \(y' = \frac{1}{3}{e^{3x}} + \frac{1}{{(x - 2)\ln 3}}\)
D. \(y' = 3{e^{3x}} + \frac{{x - 2}}{{\ln 3}}\)
A. 4
B. 3
C. 2
D. 1
A. 1
B. 2
C. 3
D. 4
A. \(\mathop {\min y}\limits_{\left[ {1;{e^4}} \right]} = 0;\mathop {\max y}\limits_{\left[ {1;{e^4}} \right]} = {e^4}\)
B. \(\mathop {\min y}\limits_{\left[ {1;{e^4}} \right]} = 0;\mathop {\max y}\limits_{\left[ {1;{e^4}} \right]} = 2{e^4}\)
C. \(\mathop {\min y}\limits_{\left[ {1;{e^4}} \right]} = 0;\mathop {\max y}\limits_{\left[ {1;{e^4}} \right]} = 4{e^4}\)
D. \(\mathop {\min y}\limits_{\left[ {1;{e^4}} \right]} = 0;\mathop {\max y}\limits_{\left[ {1;{e^4}} \right]} = 16{e^4}\)
A. 1
B. 2
C. 3
D. 4
A. 4
B. 5
C. 6
D. 7
A. 36.800.000 đồng
B. 39.200.000 đồng.
C. 37.451.777 đồng.
D. 38.400.000 đồng.
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