• 2022-05-31 问题

    1)z^2=z拔(2)z^2+|z|=0

    1)z^2=z拔(2)z^2+|z|=0

  • 2022-06-06 问题

    以下程序输出结果是_______int x=2,y=-1,z=2; if(x<y) if(y<0) z=0; else z+=1; System.out.println(z); A: 3 B: 2 C: 1 D: 0

    以下程序输出结果是_______int x=2,y=-1,z=2; if(x<y) if(y<0) z=0; else z+=1; System.out.println(z); A: 3 B: 2 C: 1 D: 0

  • 2022-06-18 问题

    z=0为f(z)=z^2 (e^(z^2 )-1)的 级零点,

    z=0为f(z)=z^2 (e^(z^2 )-1)的 级零点,

  • 2021-04-14 问题

    【单选题】rev(c(1,3,2,6,7,8,8,1,1,0))的运行结果 ? A. [1] 0 1 1 1 2 3 6 7 8 8 B. [1] 1 3 2 6 7 8 8 1 1 0 C. [1] 0 1 1 8 8 7 6 2 3 1 D. [1] 8 8 7 6 3 2 1 1 1 0

    【单选题】rev(c(1,3,2,6,7,8,8,1,1,0))的运行结果 ? A. [1] 0 1 1 1 2 3 6 7 8 8 B. [1] 1 3 2 6 7 8 8 1 1 0 C. [1] 0 1 1 8 8 7 6 2 3 1 D. [1] 8 8 7 6 3 2 1 1 1 0

  • 2022-06-11 问题

    设\(f\left( {x,y,z} \right) = x{y^2} + y{z^2} + z{x^2}\),则\({f_{yz}}\left( {0,-1,0} \right) = \)( ) A: 1 B: 0 C: -1 D: 2

    设\(f\left( {x,y,z} \right) = x{y^2} + y{z^2} + z{x^2}\),则\({f_{yz}}\left( {0,-1,0} \right) = \)( ) A: 1 B: 0 C: -1 D: 2

  • 2021-04-14 问题

    以下程序的输出结果是( )。 main() { int x = 2, y = -1, z = 2; if (x < y) if (y < 0) z = 0; else z + = 1; printf("%d \n",z); }

    以下程序的输出结果是( )。 main() { int x = 2, y = -1, z = 2; if (x < y) if (y < 0) z = 0; else z + = 1; printf("%d \n",z); }

  • 2022-06-06 问题

    执行下列代码后,数组的值是?[img=389x159]17e0b3a13c82cf0.png[/img] A: 一维数组{1, 4, 3, 2, 1, 0} B: 一维数组{1, 8, 0, 1, 2, 3, 4, 6, 2} C: 一维数组{1, 4, 3, 2, 1, 0, 8, 6, 2} D: 一维数组{1, 8, 0, 1, 2, 2, 9}

    执行下列代码后,数组的值是?[img=389x159]17e0b3a13c82cf0.png[/img] A: 一维数组{1, 4, 3, 2, 1, 0} B: 一维数组{1, 8, 0, 1, 2, 3, 4, 6, 2} C: 一维数组{1, 4, 3, 2, 1, 0, 8, 6, 2} D: 一维数组{1, 8, 0, 1, 2, 2, 9}

  • 2022-07-26 问题

    曲线\( \left\{ {\matrix{ { { x^2} + {y^2} = {z^2}} \cr { { z^2} = y} \cr } } \right. \)在坐标面\( yoz \) 上的投影曲线方程为( ) A: \( \left\{ {\matrix{ { { x^2} + { { \left( {y - {1 \over 2}} \right)}^2} = {1 \over 4}} \cr {z = 0} \cr } } \right. \) B: \( \left\{ {\matrix{ { { z^2} = y} \cr {x = 0} \cr } } \right. \) C: \( \left\{ {\matrix{ {z = {y^2}} \cr {x = 0} \cr } } \right. \) D: \( \left\{ {\matrix{ { { y^2} + { { \left( {x - {1 \over 2}} \right)}^2} = {1 \over 4}} \cr {z = 0} \cr } } \right. \)

    曲线\( \left\{ {\matrix{ { { x^2} + {y^2} = {z^2}} \cr { { z^2} = y} \cr } } \right. \)在坐标面\( yoz \) 上的投影曲线方程为( ) A: \( \left\{ {\matrix{ { { x^2} + { { \left( {y - {1 \over 2}} \right)}^2} = {1 \over 4}} \cr {z = 0} \cr } } \right. \) B: \( \left\{ {\matrix{ { { z^2} = y} \cr {x = 0} \cr } } \right. \) C: \( \left\{ {\matrix{ {z = {y^2}} \cr {x = 0} \cr } } \right. \) D: \( \left\{ {\matrix{ { { y^2} + { { \left( {x - {1 \over 2}} \right)}^2} = {1 \over 4}} \cr {z = 0} \cr } } \right. \)

  • 2022-06-03 问题

    4.已知二元函数$z(x,y)$满足方程$\frac{{{\partial }^{2}}z}{\partial x\partial y}=x+y$,并且$z(x,0)=x,z(0,y)={{y}^{2}}$,则$z(x,y)=$( ) A: $\frac{1}{2}({{x}^{2}}y-x{{y}^{2}})+{{y}^{2}}+x$ B: $\frac{1}{2}({{x}^{2}}{{y}^{2}}+xy)+{{y}^{2}}+x$ C: ${{x}^{2}}{{y}^{2}}+{{y}^{2}}+x$ D: $\frac{1}{2}({{x}^{2}}y+x{{y}^{2}})+{{y}^{2}}+x$

    4.已知二元函数$z(x,y)$满足方程$\frac{{{\partial }^{2}}z}{\partial x\partial y}=x+y$,并且$z(x,0)=x,z(0,y)={{y}^{2}}$,则$z(x,y)=$( ) A: $\frac{1}{2}({{x}^{2}}y-x{{y}^{2}})+{{y}^{2}}+x$ B: $\frac{1}{2}({{x}^{2}}{{y}^{2}}+xy)+{{y}^{2}}+x$ C: ${{x}^{2}}{{y}^{2}}+{{y}^{2}}+x$ D: $\frac{1}{2}({{x}^{2}}y+x{{y}^{2}})+{{y}^{2}}+x$

  • 2022-06-06 问题

    已知方程组4x-5y+2z=0x+4y-3z=0(xyz≠0),则x:y:z等于(  ) A: 2:1:3 B: 3:2:1 C: 1:2:3 D: 3:1:2

    已知方程组4x-5y+2z=0x+4y-3z=0(xyz≠0),则x:y:z等于(  ) A: 2:1:3 B: 3:2:1 C: 1:2:3 D: 3:1:2

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