题目内容
求值:
(1)2-
+
+
-
;
(2)lg5(lg8+lg1000)+(lg2
)2+lg
+lg0.06.
(1)2-
| 1 |
| 2 |
| (-4)0 | ||
|
| 1 | ||
|
(1-
|
(2)lg5(lg8+lg1000)+(lg2
| 3 |
| 1 |
| 6 |
(1)原式=
+
(
+1)-1=
×2+
=2
.
(2)原式=lg5(3lg2+3)+(
lg2)2-lg6+lg
=3lg5lg2+3lg5+3lg22-lg6+lg6-2
=3lg2(lg5+lg2)+3lg5-2
=3(lg2+lg5)-2
=3-2=1.
| 1 | ||
|
| 1 | ||
|
| 2 |
| ||
| 2 |
| 2 |
| 2 |
(2)原式=lg5(3lg2+3)+(
| 3 |
| 6 |
| 100 |
=3lg5lg2+3lg5+3lg22-lg6+lg6-2
=3lg2(lg5+lg2)+3lg5-2
=3(lg2+lg5)-2
=3-2=1.
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