MCQ
एक मैट्रिक्स $A =\left[ a _{ o }\right]_{ m \times n }$ सममित है यदि :
- A$a _{ ij }=0$
- B$a_{i j}=-a_{j i}$
- ✓$a_{i j}=a_{j i}$
- D$a_{i j}=1$
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