| 1.8 |
| 1 |
| 2 |
| 1 |
| 2 |
| 18 |
| 10 |
| 1 |
| 2 |
| 2×9 |
| 10 |
=
| 1 |
| 2 |
=
| 1 |
| 2 |
=
| 1 |
| 2 |
故答案为
| a+2b−1 |
| 2 |
设lg2=a，lg3=b，那么lg1.8=_．
设lg2=a，lg3=b，那么lg
=______．
| 1.8 |
数学人气：499 ℃时间：2020-02-03 11:09:55
优质解答
lg
=
lg1.8=
lg
=
lg
=
（lg 2+lg 9-1）
=
(lg2+2lg3−1)
=
（a+2b-1）．
故答案为
．
=
=
=
故答案为
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