题目内容
计算下列各式:
(1)(2
)
-(-9.6)0-(3
)-
+(1.5)-2;
(2)log3
+lg25+lg4+7log72.
(1)(2
| 1 |
| 4 |
| 1 |
| 2 |
| 3 |
| 8 |
| 2 |
| 3 |
(2)log3
| |||
| 3 |
(1)原式=(
)2-1-(
)-
+(
)-2
=(
)2×
-1-(
)-3×
+(
)-2
=
-1-(
)-2+(
)-2=
(2)原式=log3
+lg(25×4)+2
=log33-
+lg102+2
=-
+2+2=
| 9 |
| 4 |
| 27 |
| 8 |
| 2 |
| 3 |
| 3 |
| 2 |
=(
| 3 |
| 2 |
| 1 |
| 2 |
| 3 |
| 2 |
| 2 |
| 3 |
| 3 |
| 2 |
=
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 1 |
| 2 |
(2)原式=log3
3
| ||
| 3 |
=log33-
| 1 |
| 4 |
=-
| 1 |
| 4 |
| 15 |
| 4 |
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