设方阵a满足e-2a-3a^2+4a^3+5a^4-6a^5=0证明e-a可逆

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设方阵a满足e-2a-3a^2+4a^3+5a^4-6a^5=0证明e-a可逆

设方阵a满足e-2a-3a^2+4a^3+5a^4-6a^5=0证明e-a可逆
设方阵a满足e-2a-3a^2+4a^3+5a^4-6a^5=0证明e-a可逆

设方阵a满足e-2a-3a^2+4a^3+5a^4-6a^5=0证明e-a可逆
对-6x^5+5x^4+4x^3-3x^2-2x+1用-x+1作带余除法:-6x^5+5x^4+4x^3-3x^2-2x+1=(-x+1)(6x^4+x^3-3x^2+2)-1
把x用A代换,可得(-A+E)(6A^4+A^3-3A^2+2E)-E=0,从而E-A可逆,且(E-A)^(-1)=6A^4+A^3-3A^2+2E