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If `k in R_ot h e ndet{a d j(k I_n)}` is equal to `K^(n-1)` b. `K^(n(n-1))` c. `K^n` d. `k`
A. `k^(n-1)`
B. `k^(n(n-1))`
C. `k^(n)`
D. `k`

1 Answer

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Best answer
Correct Answer - B
`(KI_(n))` adj. `(kI_(n))=|kI_(n)|I_(n)" "["using A (adj. A)"=|A|I]`
adj. `(kI_(n))=k^(n-1) I_(n)`
`|"adj. "(kI_(n))|=k^(n(n-1))`

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