the number of diagonal matrix of order n for which A^3=A.

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Sher Mohammad · Answer

(A^3-A)=0 A(A^2-I)=0 imply A^2=I, means only possible diagonal entries are 1 and -1, so for order n, 2*n matrix are possible. sher mohammad b.tech, iit delhi

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the number of diagonal matrix of order n for which A^3=A.

the number of diagonal matrix of order n for which A^3=A.

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