Mathematics · Linear Algebra
Let v ∈ ℝ 3 be a non-zero vector. Define a linear transformation T : ℝ 3 → ℝ 3 by T(x) = x - 2(x · v) v · v v, where x · y denotes the standard inner product in ℝ 3 . Which of the following statements is true?
- 1The trace of T is +1
- 2The determinant of T is -1✓
- 3The eigenvalues of T are only +1
- 4T is not distance preserving
Correct answer
The determinant of T is -1
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