Tìm x: a. |1 – 2x| < 3 b. 2 < |x + 3| < 3

Question

Tìm x:
a. |1 – 2x| < 3 b. 2 < |x + 3| < 3

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Josephine 2 tuần 2021-11-22T22:31:53+00:00 1 Answers 8 views 0

Answers ( )

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    2021-11-22T22:33:01+00:00

    a) $|1-2x| < 3$

    $⇔ – 3  < 1-2x < 3$

    $⇔ -4 < -2x < 2$

    $⇔ 2 > x > -1$

    b) $2<|x+3| < 3$

     

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