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in Matrices & determinants by (34 points)
For any square non zero matrix A , A+A^T must be 

a) Unit Matrix

b) Symmetric Matrix 

c) Skew Symmetric Matrix 

d) Zero Matrix

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1 Answer

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by (46.0k points)

(A+AT)= A+ (AT)= A+ A = A + AT

∴ A +Ais a symmetric matrix

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