MCQ
एक मैट्रिक्स $A=\left[a_{2 j}\right]_{n \times n}$ सममित है यदि :
- A$a_{i j}=0$
- B$a_{i j}=-a_{j i}$
- ✓$a_{i j}=a_{j i}$
- D${a_ij}=1$
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