A. \(y=5x+13\).
B. \(y=-5x-13\).
C. \(y=-5x+13\).
D. \(y=5x-13\).
A. \(-2\).
B. Không tồn tại.
C. \(1\).
D. \(2\).
A. \(m=-1\).
B. \(m=-2\).
C. \(m=4\).
D. \(m=2\).
A. \(C_{10}^{4}\).
B. \(9.A_{9}^{3}\).
C. \(A_{10}^{4}\).
D. \(9.C_{9}^{3}\).
A. \(ab>0\).
B. \(ac>0\).
C. \(ad>bc\).
D. \(cd>0\).
A. 2
B. 1
C. 3
D. 0
A. \(\frac{3a\sqrt{2}}{2}\).
B. \(\frac{3a}{4}\).
C. \(\frac{a\sqrt{2}}{2}\).
D. \(\frac{3a}{2}\).
A. \(\left( -2;+\infty \right)\).
B. \(\left( -\infty ;-1 \right)\).
C. \(\left( -\infty ;2 \right)\).
D. \(\left( -1;1 \right)\).
A. \(y={{x}^{3}}+3x+1\).
B. \(y={{x}^{2}}-2x\).
C. \(y={{x}^{3}}-3x-1\).
D. \(y={{x}^{4}}+4{{x}^{2}}+1\).
A. \(y={{x}^{4}}-3{{x}^{2}}\).
B. \(y={{x}^{3}}-3{{x}^{2}}\).
C. \(y=-{{x}^{4}}+3{{x}^{2}}\).
D. \(y=-{{x}^{3}}+3{{x}^{2}}\).
A. \(\frac{4\sqrt{3}}{3}\).
B. 2
C. 4
D. \(2\sqrt{3}\).
A. 0
B. 2
C. 1
D. 136
A. \(C_{15}^{4}+C_{15}^{5}+C_{15}^{6}\).
B. \(C_{15}^{4}.C_{11}^{5}.C_{6}^{6}\).
C. \(A_{15}^{4}.A_{11}^{5}.A_{6}^{6}\).
D. \(C_{15}^{4}+C_{11}^{5}+C_{6}^{6}\).
A. \(x=3\).
B. \(x=2\).
C. \(x=-2\).
D. \(x=-3\).
A. \(V=\frac{{{a}^{3}}\sqrt{2}}{6}\).
B. \(V={{a}^{3}}\sqrt{2}\).
C. \(V=\frac{{{a}^{3}}\sqrt{2}}{3}\).
D. \(V=\frac{{{a}^{3}}\sqrt{3}}{3}\).
A. \(f\left( 1 \right)\).
B. \(f\left( 3 \right)\).
C. \(f\left( 0 \right)\).
D. \(f\left( -2 \right)\).
A. \(\frac{{{a}^{3}}\sqrt{3}}{2}\).
B. \({{a}^{3}}\).
C. \(\frac{{{a}^{3}}\sqrt{3}}{6}\).
D. \(\frac{{{a}^{3}}\sqrt{3}}{3}\).
A. 6
B. \(-3\).
C. 5
D. \(-1\).
A. \(-\frac{4}{27}\).
B. \(\frac{4}{27}\).
C. \(5\).
D. \(-5\).
A. 2
B. 4
C. 3
D. 1
A. \(20\pi {{a}^{2}}\).
B. \(\frac{5}{3}.\pi {{a}^{2}}\).
C. \(5\pi {{a}^{2}}\).
D. \(\frac{20}{3}\pi {{a}^{2}}\).
A. \({{\log }_{15}}20=\frac{2b+1}{1+ab}\).
B. \({{\log }_{15}}20=\frac{2b+a}{1+ab}\).
C. \({{\log }_{15}}20=\frac{b+ab+1}{1+ab}\).
D. \({{\log }_{15}}20=\frac{2b+ab}{1+ab}\).
A. \(R=\frac{a\sqrt{5}}{2}\).
B. \(R=\frac{a\sqrt{5}}{4}\).
C. \(R=a\sqrt{5}\).
D. \(R=2a\sqrt{5}\).
A. \({{30}^{0}}\).
B. \({{90}^{0}}\).
C. \({{45}^{0}}\).
D. \({{60}^{0}}\).
A. \(V=\frac{8\sqrt{6}}{9}\).
B. \(V=8\sqrt{6}\).
C. \(V=24\sqrt{6}\).
D. \(V=\frac{8\sqrt{6}}{3}\).
A. \({{a}^{3}}\sqrt{6}\).
B. \(2{{a}^{3}}\sqrt{6}\).
C. \(\frac{{{a}^{3}}\sqrt{6}}{3}\).
D. \(\frac{2{{a}^{3}}\sqrt{6}}{3}\).
A. \(y=-\frac{1}{{{3}^{x}}}\).
B. \(y=\frac{1}{{{3}^{x}}}\).
C. \(y=-{{3}^{x}}\).
D. \(y={{3}^{x}}\).
A. \(\frac{\sqrt[3]{{{a}^{2}}}}{a}>1\).
B. \({{a}^{\frac{1}{3}}}>\sqrt{a}\).
C. \({{a}^{-\sqrt{3}}}>\frac{1}{{{a}^{\sqrt{5}}}}\).
D. \(\frac{1}{{{a}^{2016}}}<\frac{1}{{{a}^{2017}}}\).
A. 122 triệu người
B. 115 triệu người
C. 118 triệu người
D. 120 triệu người
A. \({{30}^{0}}\).
B. \({{60}^{0}}\).
C. \({{45}^{0}}\).
D. \({{90}^{0}}\).
A. \(\frac{\pi {{a}^{3}}}{3}\).
B. \(4\pi {{a}^{3}}\).
C. \(\pi {{a}^{3}}\).
D. \(\frac{4\pi {{a}^{3}}}{3}\).
A. \(a\sqrt{2}\).
B. \(\frac{a}{2}\).
C. \(\frac{a\sqrt{2}}{2}\).
D. \(2a\sqrt{2}\).
A. 26
B. 10
C. 24
D. 12
A. 4
B. 2
C. 5
D. 0
A. \(5\pi {{a}^{2}}\).
B. \(3\pi {{a}^{2}}\).
C. \(4\pi {{a}^{2}}\).
D. \(2\pi {{a}^{2}}\).
A. \(m=\frac{9}{2}\).
B. \(m=-\frac{1}{2}\).
C. \(m=\frac{7}{12}\).
D. \(m=2\).
A. \(\frac{a\sqrt{13}}{13}\).
B. \(\frac{a\sqrt{13}}{3}\).
C. \(a\sqrt{13}\).
D. \(\frac{3a}{\sqrt{13}}\).
A. \(2\sqrt{6}\).
B. \(\frac{6}{\sqrt{3}}\).
C. \(\frac{\sqrt{6}}{2}\).
D. \(\frac{\sqrt{6}}{3}\).
A. 7
B. 5
C. 3
D. 6
A. 5
B. 4
C. 3
D. 2
A. 3
B. 6
C. 5
D. 4
A. \(4\sqrt{3}\).
B. \(\frac{2}{\sqrt{3}}\).
C. \(\sqrt{3}\).
D. \(\frac{4}{\sqrt{3}}\).
A. \(\frac{2295}{5985}\).
B. \(\frac{2259}{5985}\).
C. \(\frac{2085}{5985}\).
D. \(\frac{2058}{5985}\).
A. \(\frac{8}{5}\).
B. \(\frac{64}{25}\).
C. \(\frac{7}{5}\).
D. \(\frac{49}{25}\).
A. \(\frac{2-\sqrt{2}}{2}\).
B. \(\frac{2+\sqrt{2}}{2}\).
C. \(\sqrt{2}+1\).
D. \(\sqrt{2}-1\).
A. 1
B. \(\frac{4}{5}\).
C. \(\frac{3}{4}\).
D. \(\frac{3}{5}\).
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