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Anonymous User Best Answer
(D) (A+A*)*= A*+A**=A*+A A is harmition (A). (AB+BA)*=(AB)*+(BA)* =B*A*+A*B* = BA+AB So hermition (c) (B*B)*=B*B**=B*B (B). (AB-BA)*=(AB)*-(BA)* =B*A*-A*B* = BA-AB =-(AB-BA) So skew hermition