Mathematics · Linear Algebra
Let P be a square matrix such that P 2 = P. Which of the following statements is always true?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Trace of P is an imaginary complex number
- 2Trace of P is a strictly negative integer
- 3Trace of P = rank of P✓
- 4Trace of P is an irrational number
Correct answer
Trace of P = rank of P
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