munao5049 munao5049
  • 14-03-2024
  • Mathematics
contestada

Let u be a real n × 1 vector satisying uTu = 1 and A = I - 2uuT Then which of the following is (are) true?
a) A is singular
b) A² = A
c) Trace(A) = n-2
d) A² = I

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