1 Let A, B . Determine "true" or "false" for the following statements. If "true", prove it; if "false", give a counterexample.
(c) If A3 +3A2+3A+ 1 = 0, then A is invertible.
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. Determine "true" or "false" for the following statements. If "true", prove it; if "false", give a counterexample.