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Question
Evaluate the following determinants: `|(2"i", 3),(4, -"i")|`
Solution
`|(2"i", 3),(4, -"i")|`
= 2i(– i) – 3(4)
= – 2i2 – 12
= – 2(– 1) –12 ...[∵ i2 = – 1]
= 2 –12
= – 10
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