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If A=[a b c d] (where b c!=0 ) satisfies...

If `A=[a b c d]` (where `b c!=0` ) satisfies the equations `x^2+k=0,t h e n` `a+d=0` b. `K=-|A|` c. `k=|A|` d. none of these

A

`a+d=0&k=|A|`

B

`a-d=0 & k=|A|`

C

`a+d=0 & k=-|A|`

D

`a+d ne 0,& k=|A|`

Text Solution

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The correct Answer is:
A
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