7. If -3 < x < 3, determine c and d for the inequality c < 2x + 1 < d

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7. If -3 < x < 3, determine c and d for the inequality c < 2x + 1 < d

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Thông Đạt 5 years 2021-07-18T21:30:36+00:00 1 Answers 17 views 0

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  1. bonexptip
    0
    2021-07-18T21:32:13+00:00
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    Answer:

    C= -5

    D = 7

    Step-by-step explanation:

    - 3 < x < 3 \\ \\ - 6 < 2x < 6 \\ \\ - 6 + 1 < 2x + 1 < 6 + 1 \\ \\ - 5 < 2x + 1 < 7

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )