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+1 vote
51.7k views
in Mathematics by (60.8k points)

Using properties of determinants, prove the following:

|(a,a+b,a+2b),(a+2b,a,a+b),(a+b,a+2b,a)|=9b2(a+b)

1 Answer

+1 vote
by (52.9k points)
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Expanding along first row, we have

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