设A是等幂矩阵(即A^2=A),则(A+E)^-1=

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设A是等幂矩阵(即A^2=A),则(A+E)^-1=
设A是等幂矩阵(即A^2=A),则(A+E)^-1=

设A是等幂矩阵(即A^2=A),则(A+E)^-1=
(A+E)^-1=E/(A+E) = (A-E)/(A+E)(A-E) = (A-E)/(A²-E) = (A-E)/(A-E) = E

(A+E)^2-1=A^2+2AE+E^2-1=A+2A+1-1=3A
感觉不好请见谅

(A+E)^-1=E/(A+E) = (A-E)/(A+E)(A-E) = (A-E)/(A²-E) = (A-E)/(A-E) = E