[" 9.एक मैट्रिक्स "A=[a(ij)](n times n)"...

[" 9.एक मैट्रिक्स "A=[a_(ij)]_(n times n)" सममित है,यदि "],[[" (A) "a_(ij)=0," (B) "a_(ii)=-a_(ii)," (C) "a_(ij)=a_(ji)," (D) "a_(ij)=1]]

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