Ai g hộ mk bài 4 mới

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Ai g hộ mk bài 4 mới

ai-g-ho-mk-bai-4-moi

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Vodka 10 months 2020-11-21T04:05:27+00:00 1 Answers 51 views 0

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    0
    2020-11-21T04:06:35+00:00

    Đáp án:

     c. a=6

    Giải thích các bước giải:

    \(\begin{array}{l}
    a.Do:x > 0\\
     \to \dfrac{{a – 6}}{a} > 0\\
     \to \left[ \begin{array}{l}
    \left\{ \begin{array}{l}
    a – 6 > 0\\
    a > 0
    \end{array} \right.\\
    \left\{ \begin{array}{l}
    a – 6 < 0\\
    a < 0
    \end{array} \right.
    \end{array} \right. \to \left[ \begin{array}{l}
    a > 6\\
    a < 0
    \end{array} \right.\\
    b.Do:x < 0\\
     \to \dfrac{{a – 6}}{a} < 0\\
     \to \left[ \begin{array}{l}
    \left\{ \begin{array}{l}
    a – 6 < 0\\
    a > 0
    \end{array} \right.\\
    \left\{ \begin{array}{l}
    a – 6 > 0\\
    a < 0
    \end{array} \right.
    \end{array} \right. \to \left[ \begin{array}{l}
    \left\{ \begin{array}{l}
    a < 6\\
    a > 0
    \end{array} \right.\\
    \left\{ \begin{array}{l}
    a > 6\\
    a < 0
    \end{array} \right.\left( l \right)
    \end{array} \right.\\
     \to 0 < a < 6\\
    c.Do:x = 0\\
     \to \dfrac{{a – 6}}{a} = 0\\
     \to a – 6 = 0\\
     \to a = 6
    \end{array}\)

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