Page 19 - 數學B第一冊學習講義

Chapter 1 坐標系與函數圖形 13

1 - 2 學習成效驗收

1. Ӌഒ࿁࠽˙೻όٙ༆

Ȅ |-2x| = -4 & x =
ȅ |x - 3| = 2 & x =

Ȇ |5 - 3x| = 7 & x =

ȇ |2x + 6| = |x - 5| & x =

2. Ӌഒ࿁࠽ʔഃόٙ༆

Ȅ |x| ≥ 3 ʘ༆މ

ȅ |x - 1| ≤4 ʘ༆މ
Ȇ |2x + 3| > 5 ʘ༆މ

ȇ |1 - 2x| < 9 ʘ༆މ

3. ίᅰᇞɪϞɧᓃ A(10)eB(-8)eC(x)d ۆ
Ȅ ߰ C(x) Ցࡡᓃٙ൷ᕎމ 6dۆ x =

ȅ ߰ AB = AC d ۆ x =
Ȇ ߰ 3AB = 2BC d ۆ x =

4. ߰ |x - a| < b ٙ༆މ -4 < x < 3dۆ a - b =

5. ߰ |x - a| ≥ b ٙ༆މ x ≤ - 4 א x ≥9dۆ a + b =