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Question
Find the value of determinant :
`|(2"i", 3),(4, -"i")|`
Solution
`|(2"i", 3),(4, -"i")|`
= 2i(– i) – 4(3)
= –2i2 – 12
= –2(– 1) – 12 ...[∵ i2 = – 1]
= 2 – 12
= – 10
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