If $A = [25 3 - 2]$ , then $19 A^{- 1}$ is equal to

A^{T}

2 A

\frac{1}{2} A

A

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Harper Discussed

A = [25 3 - 2]

, then

19 A^{- 1}

is equal to

6 mins ago

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Text solutionVerified

A = [25 3 - 2] a d j A = [- 2 - 3 - 5 2] ∣ A ∣ = - 4 - 15 = - 19 ∴ 19 A^{- 1} = - ∣ ∣ - 2 - 5 - 3 2 ∣ ∣ = [23 5 - 2]

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