If A is an idempotent matrix satisfying- I - 0-4 A-1 - I - - A- where I is the unit matrix of the same order as that of A- then the value of -9 - is equal to -

A is an idempotent matrix i.e A^ 2 =A ( I 0.4A ) ^ 1 =I α A ⇒ I=( I α A ) ( I 0.4A ) =I^ 2 0.4AI α AI+0.4α A^ 2 ...

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Summation by Sigma Method

If A is an ...

Question

If $A$ is an idempotent matrix satisfying, $(I - 0.4 A)^{- 1} = I - α A$ , where $I$ is the unit matrix of the same order as that of $A$ , then the value of $| 9 α |$ is equal to ..............

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