Page 10 - ePD307_數學B第三冊學習講義_課本PDF

6 數學 B 第三冊

1 - 1 學習成效驗收 解析 P.2

1. ༆ɨΐ΢˙೻όj

Ȅ 5(4x + 1) + 2 = 4(5x - 1) + 11 & x = f
1
ȅ x + 1 = 4 & x = f
2
Ȇ 3x = x & x = f
ȇ 5 - 7x = - 5x - 1 & x = f

2. ༆ɨΐ΢˙೻όj
Ȅ x - 5 = x + 6 & x = f
ȅ 3x = 3x - 4 & x = f

Ȇ 4x + 5 = 4x + 5 & x = f

ȇ 3x - 4 = 5 & x = f

3. ༆ɨΐ΢˙೻όj
x x
Ȅ x = 1 + + & x = f
2 4
15 - 4x
ȅ x - = 2 & x = f
3
Ȇ (4x + 7) - x = (3x + 4) - 3 & x = f

4. ༆ɨΐ΢˙೻όj
x x
Ȅ x = 1 + + & x = f
3 9
9 + x
ȅ - 2x + = 3 & x = f
2
Ȇ 2x - 3[x - (1 + x)] = 13 + 2x & x = f

5. ༆ɨΐ΢ʔഃόdԨྡͪՉ༆j
Ȅ x + 2 > 8 & fcȅ 5x < 12 & f

Ȇ - 3x > 9 & fc ȇ 3x - 6 # 4x + 1 & f

6. ༆ʔഃό x $ 3x - 4 > - 2x + 1 & f

7. ༆ʔഃό 3x - 3 < 9 # 4x + 1 & f