|α1,α2,α3| = a 1 1 1 a -1 1 -1 a = (a - 2)(a + 1)^2.是怎么得到等号后面的,|α1,α2,α3| =a 1 11 a -11 -1 a= (a - 2)(a + 1)^2.
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|α1,α2,α3|=a111a-11-1a=(a-2)(a+1)^2.是怎么得到等号后面的,|α1,α2,α3|=a111a-11-1a=(a-2)(a+1)^2.|α1,α2,α3|=a111a-
|α1,α2,α3| = a 1 1 1 a -1 1 -1 a = (a - 2)(a + 1)^2.是怎么得到等号后面的,|α1,α2,α3| =a 1 11 a -11 -1 a= (a - 2)(a + 1)^2.
|α1,α2,α3| = a 1 1 1 a -1 1 -1 a = (a - 2)(a + 1)^2.是怎么得到等号后面的,
|α1,α2,α3| =
a 1 1
1 a -1
1 -1 a
= (a - 2)(a + 1)^2.
|α1,α2,α3| = a 1 1 1 a -1 1 -1 a = (a - 2)(a + 1)^2.是怎么得到等号后面的,|α1,α2,α3| =a 1 11 a -11 -1 a= (a - 2)(a + 1)^2.
行列式的值你不会求吗?对角线相乘.这是笨法
还可以先化简:
【1】a+a=a×a a= [ ]【2】a×a=a÷a a=[ ]【3】a×a=a-a a=[ ] [4]a-a=a+a a=[ ]
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(a+2)(a+1)-a(a-3)
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|α1,α2,α3| = a 1 1 1 a -1 1 -1 a = (a - 2)(a + 1)^2.是怎么得到等号后面的,|α1,α2,α3| =a 1 11 a -11 -1 a= (a - 2)(a + 1)^2.
2a(a-2)-(a+1)(a-3)=?
a+a^2+a^3+a^4+a^5+a^6...+a^n=a^n+1-a/a-1 (a-1)≠0
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化简多项式a-2a+3a-4a+5a-...+99a-100a用下面方法解决 a-(a+b)+(a+2b)-(a+3b)+...-(a+101b)解法1:a-2a+3a-4a+5a-..+99a-100a =(a+3a+5a+..+99a)+(-2a-4a-6a-...-100a)=2500a-2550a=-50a解法2:a-2a+3a-4a+5a-...+99a-100a=(a-2a)+(3a-4a)+(5a-6a)+..