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用克莱姆法则解下线性方程组 2x1+2x2%x3+x4=4 4x1+...

D=|2,2,-1,1| 4,3,-1,2 8,3,-3,4 3,3,-2,-2 =-28 D1=|(4,2,-1,1)(16,3,-1,2)(12,3-3,4)(6,3,-2,-2)|=-148 D2=|(2,4,-1,1)(4,16,-1,2)(8,12,-3,4)(3,6,-2,-2)|=-84 D3=|(2,2,4,1)(4,3,16,1)(8,3,12,4)(3,3,6,-2)|=-308 D4=|(2,2,-1,4)(4,3,-1,16)...

用克莱姆法则解线性方程组 x1-2x2+4x3=2 -x1+2x2-x3=1 2x1-3x2+7x3=2 解: D= 1 -2 4 -1 2 -1 2 -3 7 = -3 D1 = 2 -2 4 1 2 -1 2 -3 7 = 12 D2 = 1 2 4 -1 1 -1 2 2 7 = 3 D3 = 1 -2 2 -1 2 1 2 -3 2 =-3 由克莱姆法则, x1=D1/D=-4,x2=D2/D=-1,x3...

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