F(z)=1/z,Res[f(z),∞]=? (单选题) (单选题) (单选题) A: -1 B: 1 C: -2 D: 2
F(z)=1/z,Res[f(z),∞]=? (单选题) (单选题) (单选题) A: -1 B: 1 C: -2 D: 2
因果信号f(k)的像函数 A: |z|＞2 B: |z|＞1 C: |z|＜1 D: 1<|z|＜2
因果信号f(k)的像函数 A: |z|＞2 B: |z|＞1 C: |z|＜1 D: 1<|z|＜2
调用下面函数,错误的是( )。def f(x, y = 0, z = 0): pass #空语句,定义空函数体 A: f(z = 3, x = 1, y = 2) B: f(1, x = 1, z = 3) C: f(1, y = 2, z = 3) D: f(1, z = 3)
调用下面函数,错误的是( )。def f(x, y = 0, z = 0): pass #空语句,定义空函数体 A: f(z = 3, x = 1, y = 2) B: f(1, x = 1, z = 3) C: f(1, y = 2, z = 3) D: f(1, z = 3)
执行下面代码，错误的是def f(x, y = 0, z = 0): pass # 空语句，定义空函数体 A: f(1, x = 1, z = 3) B: f(z = 3, x = 1, y = 2) C: f(1, z = 3) D: f(1, y = 2, z = 3)
执行下面代码，错误的是def f(x, y = 0, z = 0): pass # 空语句，定义空函数体 A: f(1, x = 1, z = 3) B: f(z = 3, x = 1, y = 2) C: f(1, z = 3) D: f(1, y = 2, z = 3)
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,
将函数f(z)=1/(1+z^2),0
将函数f(z)=1/(1+z^2),0
设\(w = f(x + y + z,xyz)\)，其中\(f\)有连续偏导数，则\( { { {\partial}w} \over {\partial {x}}} =\) A: \({f'_1} + yz{f'_2}\) B: \(x{f'_1} + yz{f'_2}\) C: \(yz{f'_1} +x{f'_2}\) D: \({f'_1} +{f'_2}\)
设\(w = f(x + y + z,xyz)\)，其中\(f\)有连续偏导数，则\( { { {\partial}w} \over {\partial {x}}} =\) A: \({f'_1} + yz{f'_2}\) B: \(x{f'_1} + yz{f'_2}\) C: \(yz{f'_1} +x{f'_2}\) D: \({f'_1} +{f'_2}\)
执行下面代码，错误的是def f(x, y = 0, z = 0): pass # 空语句，定义空函数体 A: f(1, 2) B: f(1, , 3) C: f(1) D: f(1, 2, 3)
执行下面代码，错误的是def f(x, y = 0, z = 0): pass # 空语句，定义空函数体 A: f(1, 2) B: f(1, , 3) C: f(1) D: f(1, 2, 3)
【简答题】设 z 1 =4 + 3i , z 2 =2 - 3i ,计算 z 1 · z 2
【简答题】设 z 1 =4 + 3i , z 2 =2 - 3i ,计算 z 1 · z 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
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