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यदि A, 3 × 3 कोटि का आव्यूह है तो |adj A| का मान है| 

(a) |A| 

(b) |A|2 

(c) |A|3 

(d) 3|A|

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चूँकि हम जानते हैं कि |adj A| = |A|n-1 यहाँ n = 3 

∴ |adj A| = |A|2 

अत: विकल्प (b) सही है।

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