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MMLU / Let V be a finite-dimensional real vector space and let P be a linear…

Problem

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question

Let V be a finite-dimensional real vector space and let P be a linear transformation of V such that P^2 = P. Which of the following must be true?
I. P is invertible.
II. P is diagonalizable.
III. P is either the identity transformation or the zero transformation.

choices

  1. None
  2. I only
  3. II only
  4. III only

subject

college_mathematics

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Source and history

Official source

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