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Question

Given that ∣ ∣ad1be1cf1∣ ∣=5,∣ ∣abc123def∣ ∣=3, then the value of ∣ ∣c3fb1ea1d∣ ∣ is

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Solution

2∣ ∣ad1be1cf3∣ ∣3∣ ∣ad1be1cf1∣ ∣=21

∣ ∣ad1be1cf3∣ ∣=21
R1R3
∣ ∣cf3be1ad1∣ ∣=21
C2C3 we get determinant.
∣ ∣c3fb1ea1d∣ ∣=21

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