A. \({{S}_{tp}}=16\pi \).
B. \({{S}_{tp}}=20\pi \).
C. \({{S}_{tp}}=24\pi \).
D. \({{S}_{tp}}=12\pi \).
A. \(x=4\).
B. \(x=2\).
C. \(x=3\).
D. \(x=1\).
A. \((1;2)\)
B. \((-\infty ;1)\)
C. \((1;+\infty )\)
D. \((-\infty ;5)\)
A. -1
B. 1
C. -3
D. 3
A. \(\frac{\sqrt{5}}{2}\)
B. \(\frac{\sqrt{13}}{2}\)
C. \(\frac{\sqrt{10}}{2}\)
D. \(\frac{\sqrt{17}}{2}\)
A. \(\frac{5}{3}\)
B. \(-\frac{3}{4}\)
C. \(-\frac{1}{5}\)
D. \(\frac{5}{8}\)
A. \(\left[ -1;+\infty \right)\).
B. \(\left[ -1;1 \right)\).
C. \(\left( -\infty ;1 \right)\).
D. \(\left( -\infty ;-1 \right]\)
A. \(\left\{ \begin{align} & x=-2+4t \\ & y=-6t \\ & z=1+2t \\ \end{align} \right. \)
B. \(\left\{ \begin{align} & x=-2+2t \\ & y=-3t \\ & z=1+t \\ \end{align} \right. \)
C. \(\left\{ \begin{align} & x=4+2t \\ & y=-6-3t \\ & z=2+t \\ \end{align} \right. \)
D. \(\left\{ \begin{align} & x=2+2t \\ & y=-3t \\ & z=-1+t \\ \end{align} \right. \)
A. \(-5\cos 5x+C\)
B. \(5\cos 5x+C\)
C. \(-\frac{1}{5}\cos 5x+C\)
D. \(\frac{1}{5}\cos 5x+C\)
A. Đạt cực tiểu tại \(x=1.\)
B. Đạt cực đại tại \(x=-1.\)
C. Đạt cực tiểu tại \(x=2.\)
D. Đạt cực tiểu tại \(x=0.\)
A. \(A_{7}^{3}.\)
B. \(C_{7}^{3}.\)
C. \({{6}^{3}}.\)
D. \(A_{6}^{3}.\)
A. \(\frac{1023}{2}\)
B. 1364
C. \(\frac{341}{2}\)
D. 682
A. \(S=\int\limits_{0}^{4}{f(x)d\text{x}}\)
B. \(S=\int\limits_{0}^{1}{f(x)d\text{x}}-\int\limits_{1}^{4}{f(x)d\text{x}}\)
C. \(S=-\int\limits_{0}^{4}{f(x)d\text{x}}\)
D. \(S=-\int\limits_{0}^{1}{f(x)d\text{x}}+\int\limits_{1}^{4}{f(x)d\text{x}}\)
A. \(2+\sqrt{2}\)
B. \(1+\sqrt{2}\)
C. \(2+\sqrt{5}\)
D. \(1+\sqrt{5}\)
A. \(-\frac{1}{2}+2i\)
B. \(2-\frac{1}{2}i\)
C. \(-1+2i\)
D. \(-1-2i\)
A. \(y={{x}^{4}}-3{{\text{x}}^{2}}\)
B. \(y=-\frac{1}{4}{{x}^{4}}+3{{\text{x}}^{2}}\)
C. \(y=-{{x}^{4}}-2{{x}^{2}}\)
D. \(y=-{{x}^{4}}+4{{\text{x}}^{2}}\)
A. \(2{{\text{a}}^{3}}\sqrt{2}\)
B. \(3{{\text{a}}^{3}}\sqrt{3}\)
C. \({{a}^{3}}\)
D. \(8{{\text{a}}^{3}}\)
A. \({{e}^{2}}-1.\)
B. \({{e}^{2}}-e.\)
C. \({{e}^{2}}+e.\)
D. \(e-{{e}^{2}}.\)
A. \(\frac{\sqrt{3}{{a}^{3}}}{4}.\)
B. \(\frac{\sqrt{3}{{a}^{3}}}{2}.\)
C. \(\frac{\sqrt{3}{{a}^{3}}}{12}.\)
D. \(\frac{\sqrt{3}{{a}^{3}}}{6}.\)
A. 3
B. 2
C. 4
D. 1
A. -1
B. 1
C. -9
D. 9
A. \(90{}^\circ \)
B. \(45{}^\circ \)
C. \(30{}^\circ \)
D. \(60{}^\circ \)
A. m = 1
B. m = 2
C. \(m=\frac{2}{3}\)
D. \(m=\frac{1}{3}\)
A. \({y}'=\frac{1}{x(\ln 3-2\ln 2)}\)
B. \({y}'=\frac{1}{\left| x \right|(\ln 3-2\ln 2)}\)
C. \({y}'=\frac{\ln 3}{2\text{x}\ln 2}\)
D. \({y}'=\frac{\ln 3}{2\left| x \right|\ln 2}\)
A. \(6x-3y-2z+12=0\).
B. \(6x-3y+2z-12=0\).
C. \(6x+3y+2z-12=0\).
D. \(6x-3y-2z-12=0\).
A. \({{x}^{2}}+{{\left( y-1 \right)}^{2}}+{{\left( z+1 \right)}^{2}}=4\).
B. \({{x}^{2}}+{{\left( y+1 \right)}^{2}}+{{\left( z-1 \right)}^{2}}=4\).
C. \({{x}^{2}}+{{\left( y+1 \right)}^{2}}+{{\left( z+1 \right)}^{2}}=4\).
D. \({{x}^{2}}+{{\left( y-1 \right)}^{2}}+{{\left( z+1 \right)}^{2}}=2\).
A. 3
B. 5
C. 4
D. 6
A. 2
B. 4
C. 3
D. 1
A. 8\(\pi \) dm3.
B. \(\frac{15}{2}\pi \)dm3.
C. \(\frac{14}{3}\pi \)dm3.
D. \(\frac{15}{2}\)dm3.
A. \(1<a<2.\)
B. \(a<-2.\)
C. \(a\ge 3.\)
D. \(0<a\le 1.\)
A. \(V=3\pi {{a}^{3}}\).
B. \(V=9\pi {{a}^{3}}\).
C. \(V=27\pi {{a}^{3}}\).
D. \(V=12\pi {{a}^{3}}\).
A. \(\frac{a\sqrt{3}}{4}\)
B. \(\frac{a\sqrt{2}}{2}\)
C. \(\frac{a\sqrt{3}}{2}\)
D. \(\frac{a}{2}\)
A. \(a+b=\frac{11}{2}.\)
B. \(a+b=\frac{19}{3}.\)
C. \(a+b=1.\)
D. \(a+b=5.\)
A. \(\Delta :\frac{x-2}{2}=\frac{y}{1}=\frac{z-2}{-1}.\)
B. \(\Delta :\frac{x-2}{2}=\frac{y}{-5}=\frac{z-2}{-1}.\)
C. \(\Delta :\frac{x-3}{3}=\frac{y-1}{1}=\frac{z-1}{1}.\)
D. \(\Delta :\frac{x-3}{2}=\frac{y-1}{-5}=\frac{z-1}{-1}.\)
A. \(\sqrt[3]{\frac{3}{4\pi }}\left( dm \right)\)
B. \(\sqrt[3]{\frac{3}{8\pi }}\left( dm \right)\)
C. \(\sqrt[3]{\frac{3}{2\pi }}\left( dm \right)\)
D. \(\sqrt[3]{2\pi }\left( dm \right)\)
A. 3
B. 4
C. 1
D. 2
A. \(2a=b.\)
B. \({{a}^{3}}={{b}^{2}}.\)
C. \({{a}^{2}}={{b}^{3}}.\)
D. \(3a=2b.\)
A. 8
B. 5
C. 3
D. 2
A. \(\frac{625}{1701}\)
B. \(\frac{1}{9}\)
C. \(\frac{1}{18}\)
D. \(\frac{1250}{1701}\)
A. \(\frac{x-3}{1}=\frac{y-1}{1}=\frac{z+2}{1}\)
B. \(\frac{x-1}{1}=\frac{y-1}{-1}=\frac{z-1}{-4}\)
C. \(\frac{x+2}{1}=\frac{y+1}{1}=\frac{z-1}{1}\)
D. \(\frac{x+1}{2}=\frac{y-1}{2}=\frac{z-4}{2}\)
A. \(\frac{13}{2}.\)
B. \(\frac{25}{4}.\)
C. \(\frac{27}{4}.\)
D. \(\frac{11}{2}.\)
A. \(\sqrt{2}<\left| f(1) \right|<2\)
B. \(\left| f(1) \right|\le \sqrt{2}\)
C. \(\left| f(1) \right|\ge 2\sqrt{2}\)
D. \(2\le \left| f(1) \right|>2\sqrt{2}\)
A. 11
B. 10
C. 9
D. 12
A. \(S=\frac{1}{2}\).
B. \(S=\frac{1}{4}\).
C. \(S=\frac{17}{24}\).
D. \(S=\frac{3}{4}\).
A. \(3\sqrt{2}\)
B. 3
C. 6
D. \(6\sqrt{2}\)
A. P = 20
B. P = 72
C. P = 125
D. P = 39
A. \({{r}_{1}}=\sqrt{14}\).
B. \({{r}_{1}}=12\).
C. \({{r}_{1}}=2\sqrt{14}\).
D. \({{r}_{1}}=6\).
Lời giải có ở chi tiết câu hỏi nhé! (click chuột vào câu hỏi).
Copyright © 2021 HOCTAP247