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Number of card slots 1 Number of power slots 2 Number of fans modules 2 Redundant power supply 1+1 Pluggable AC and DC power modules can be used together in the same switch. Long-term operating temperature [°C(°F)] –5°C to +45°C (23°F to 113°F) at an altitude of 0 to...
写出下列二次型的矩阵并求出二次型的秩:(1)f(x,y,z)=x2+4xy+4y2+2xz+z2+4yz;(2)f(x1,x2,x3)=x}-2x1x2+2x2-2x1x3+x3+2x2x3;(3) f(x_1,x_2, ⋯ ,x_n)= ∑ _(i=1)^(n-1)(x_i-x_(i+1))^2. 相关知识点: 试题来源: 解析 结果一 题目 写出下列二次型...
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{ x² - 4y²＋z²＝25 ，x ＝ - 3 表示双曲线。
2x−y+z−2=0andx+2y−z−3=0isx−3y+2z+1=0(b)3x+3y−2z+1=0x+3y−2z+1=0(d)3x+y=5 The shortest distance between the lines 2x+y+z-1=0=3x+y+2z-2 and x=y=z, is 2x+y-z=1 x-y+z=2 3x+y-2z=-1 ...
26.用矩阵记号表示二次型:(1) f=x^2+4xy+4y^2+2xz+z^2+4yz ;(2) f=x^2+y^27z^22xy 4xz 4yz;(3) f=x_1^2+x_2^2+x_3^2-2x_1x_2+6x_2x_3 . 相关知识点: 试题来源: 解析 1 2 1 x 解 (1)f=(x,y,z) 2 4 2 ; 1 2 1 1-1-2 (2)f=(x,y,z) -1 ...
因为,如果a,b均为零时,二次曲面的方程为,x2+y2-z2-2x-4y+2z=0,即(x-1)2+(y-2)2-(z-1)2=4,这是一个单叶双曲面的方程,它不是二次锥面,所以下面考虑a,b不全为零的情况,由于二次曲面系数矩阵为 其特征方程是 展开得-(1-λ2)(1+λ)-(a2+b2)(1-λ)=0,即(1-λ)(a2+b2+1-...
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