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प्रश्न
Choose the correct alternative:
If A = `[("a", x),(y, "a")]` and if xy = 1, then det(AAT) is equal to
विकल्प
(a – 1)2
(a2 + 1)2
a2 – 1
(a2 – 1)2
उत्तर
(a2 – 1)2
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