So, once again my beloved calculator saves my sorry neck. Yesterday afternoon I had my dreaded linear algebra final---dreaded not in terms of the complexity, but in terms of annoyance. The test as well as the class itself wasn't superbly difficult, but my poor aging mind apparently can't handle simple algebraic computations, so my beloved TI-89 (otherwise known as the best $150 Ive ever spent) came in and saved the day (and the test) in terms of making sure that all the computations are correct.
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