姓名 ______________________日期 ____________得分 ____ / 12
解对数方程练习
解对数方程 · 1–12
解方程，并检验是否有增根。
1.log2 (3x) = log2 (x + 2)
2.log2 (4x − 42) = log2 (x − 6)
3.log5 (4x − 42) = log5 (x − 9)
4.log5 (3x − 17) = log5 (x + 3)
5.log2 (2x − 12) = log2 (x − 2)
6.log3 (2x + 4) = log3 (x + 10)
7.log3 (3x − 2) = log3 (x)
8.log10 (5x − 2) = log10 (x + 2)
9.log3 (5x − 16) = log3 (x + 4)
10.log2 (2x − 13) = log2 (x − 6)
11.log3 (4x − 8) = log3 (x + 7)
12.log5 (5x − 35) = log5 (x + 9)
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