Importance of Knowing The Order of Math Operations and Using Parentheses (Faulty Question)

Konusu 'Hatalı veya Tekrarlanmış Sorular (Faulty or Repeated Questions)' forumundadır ve Honore tarafından 1 Kasım 2023 başlatılmıştır.

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  1. Honore

    Honore Yönetici Yönetici

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    [​IMG]
    https://i72.servimg.com/u/f72/19/97/10/39/comple16.png
    https://images.collegedunia.com/public/college_data/images/entrance/sample_paper/1654342325Math Level 1 SAT Practice Test 14.pdf
    (Page 2, Question 8)

    The maker of this problem does not know how essential the order of operations and parentheses are in mathematics because the answer is NOT a complex number:
    [​IMG]
    https://i72.servimg.com/u/f72/19/97/10/39/comple17.png
    https://www.wolframalpha.com/input?i=45-35i/5i

    The person who wrote that problem intended as follows:
    (45 - 35i) / (5i) = (9 - 7i) / i = (9·i - 7·i^2) / (-1) = -9·i + 7·i^2 = -9·i - 7 = -7 - 9·i ====> Choice E
    So, this problem with those choices is wrong.

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