[" If I is a "(9times9)" unit matrix,"],[" then rank "(1)=]

If I is a (9xx9) unit matrix,then rank (I)=

If I_n is the identity matrix of order n, then rank of I_n is

For a matrix of rank r ,

If A is an invertible matrix and B is a matrix then (A) rank (AB)=rank(B) (B) rank (AB)=rank(A) (C) rank (AB)gtrank(B) (D) rank (AB)gtrank(A)

If A is an idempotent matrix satisfying,(I-0.4A)^(-1)=I-alpha A, where I is the unit matrix of the name order as that of A, then th value of |9 alpha| is equal to

If A is an idempotent matrix satisfying, (I-0. 4 A)^(-1)=I-alphaA ,w h e r eI is the unit matrix of the name order as that of A , then th value of |9alpha| is equal to ________.

If A is an idempotent matrix satisfying, (I-0. 4 A)^(-1)=I-alphaA ,w h e r eI is the unit matrix of the name order as that of A , then th value of |9alpha| is equal to ________.

If A is an idempotent matrix satisfying, (I-0. 4 A)^(-1)=I-alphaA ,w h e r eI is the unit matrix of the name order as that of A , then th value of |9alpha| is equal to ________.

If A is involuntary matrix and I is unit matrix of the same order then A(I - A) (I + A ) is equal to