यदि क्रम 3 का एक वर्ग आव्यूह A इस प्रकार है कि |A| = 3 है, तब adj(adj A) है:

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MP HSTET Varg 1 - 2018 (Mathematics) Held on 6th Feb 2019 Shift 2
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  1. 27A
  2. 3A
  3. 9A
  4. A

Answer (Detailed Solution Below)

Option 2 : 3A
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प्रयुक्त संकल्पना:-
A1=adjA|A|adjA=|A|A1
|kA|=kn|A|,(kA)1=1kA1 और 
|A1|=1|A|
जहाँ k कोई अदिश है और n, A की कोटि है।
 
गणना:
adj(adjA)=|adjA|(adjA)1
 ||A|A1|(|A|A1)1=|A|3|A1|1|A|A
|A|311A=|A|A=3A
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