二次型
的秩为_______.
二次型的秩为_______.
已知二次型-|||-((x)_(1),(x)_(2),(x)_(3))=2({x)_(1)}^2+3({x)_(2)}^2+3({x)_(3)}^2+2a(x)
二次型 ((x)_(1),(x)_(2),(x)_(3))=2({x)_(1)}^2+2({x)_(2)}^2+2({x)_(3)}^2-2(x)_(2)(x)
[题目]求一个正交变换 =(p)_(y), 把二次型f(x1,-|||-_(2),(x)_(3))=2({x)_(1)}^2+3({x)_(2)}^2+3(x)
28.求一个正交变换化下列二次型成标准形:-|||-(1) =2({x)_(1)}^2+3({x)_(2)}^2+3({x)_(3)}^2+4(x)_(2)(x
28.求一个正交变换化下列二次型成标准形:-|||-(1) =2({x)_(1)}^2+3({x)_(2)}^2+3({x)_(3)}^2+4(x)_(2)(x
29.已知二次型 =2({x)_(1)}^2+3({x)_(2)}^2+3({x)_(3)}^2+2a(x)_(2)(x)_(3)(agt 0) 经正交变换 x
二次型((x)_(1),(x)_(2),(x)_(3))=(({x)_(1)-(x)_(2))}^2+(({x)_(2)-(x)_(3))}^2+(({x)_(
求二次型 ((x)_(1),(x)_(2),(x)_(3))=4({x)_(2)}^2-3({x)_(3)}^2+4(x)_(1)(x)_(2)-4(x)_(1
设函数为(x)=(e)^(x^2+3)，则(x)=(e)^(x^2+3)的值为（ ）。A (x)=(e)^(x^2+3) B (x)=(e)^(x^2+3)C
用正交变换法化二次型 f ( x _ 1 , x _ 2 , x _ 3 ) = 2 x _ 1 ^ 2 + 3 x _ 2 ^ 2 + 3 x _ 3 ^