Page 20 - 數學B第一冊學習講義

14 數學 B 第一冊

1 - 2 實力測驗

1. ༊Ӌʔഃό |2x + 1| ≥ 7 ٙ༆kc

(A) -3≤ x ≤4c (B) -4≤ x ≤3c
(C) x ≤ -3 א x ≥4c (D) x ≤ -4 א x ≥3f

2. ண aeb ѩމྼᅰd߰ |x - a| < b ٙ༆މ -4 < x < 2d༊Ӌ 2a + b = c

(A) 0c(B) 1c(C) 2c(D) 3f

3. ʔഃό 1≤ |x - 2| ≤ 4 ٙ༆މc

(A) -2≤ x ≤1 א 3≤ x ≤6c (B) -2≤ x ≤1c

(C) 3 ≤ x ≤6c (D) -2≤ x ≤6f

4. ɨΐО٫ၾʔഃό |x - 4| < 8 ٙ༆޴Νkc

(A) (x + 4)(x - 12) > 0c (B) (x - 4)(x + 12) > 0 c

(C) (x + 4)(x - 12) < 0c (D) (x - 4)(x + 12) < 0f

5. ʔഃό |2x + 3| > 7 ʘ༆މc

(A)x > 2 c(B) - 5 < x < 2c(C)x > 2 א x < - 5c(D) x > 5 א x < - 2f

6. Ӌတԑ |3 - 2x| ≤ 5 ʘ༆މОkc
(A) x ≥ -1c(B) -1≤ x ≤4c(C) x ≥4 א x ≤ -1c(D)x ≥4f