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 x + log2 (x − 6) = 4
2.log3 x + log3 (x − 8) = 2
3.log10 x + log10 (x − 21) = 2
4.log2 x + log2 (x − 3) = 2
5.log5 x + log5 (x − 24) = 2
6.log3 x + log3 (x − 6) = 3
7.log2 x + log2 (x − 4) = 5
8.log6 x + log6 (x − 5) = 2
9.log6 x + log6 (x − 9) = 2
10.log2 x + log2 (x − 2) = 3
11.log2 x + log2 (x − 12) = 6
12.log10 x + log10 (x − 15) = 2
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