题目内容
计算:
(1)(log43+log83)(log32+log92)
(2)0.027 -
-(-
)-2+2560.75-
+(
)0.
(1)(log43+log83)(log32+log92)
(2)0.027 -
| 1 |
| 3 |
| 1 |
| 6 |
| 1 |
| 3 |
| 1 |
| 9 |
分析:(1)利用对数的运算法则和对数的换底公式即可得出;
(2)利用指数幂的运算法则即可得出.
(2)利用指数幂的运算法则即可得出.
解答:解:(1)原式=(
+
)(
+
)=
×
(
+
)(1+
)=
×
=
.
(2)原式=0.33×(-
)-6-1×(-2)+44×
-
+1
=(
)-1-62+43+
=
-36+64+
=4-36+64
=32.
| lg3 |
| 2lg2 |
| lg3 |
| 3lg2 |
| lg2 |
| lg3 |
| lg2 |
| 2lg3 |
| lg3 |
| lg2 |
| lg2 |
| lg3 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 2 |
| 5 |
| 6 |
| 3 |
| 2 |
| 5 |
| 4 |
(2)原式=0.33×(-
| 1 |
| 3 |
| 3 |
| 4 |
| 1 |
| 3 |
=(
| 3 |
| 10 |
| 2 |
| 3 |
=
| 10 |
| 3 |
| 2 |
| 3 |
=4-36+64
=32.
点评:本题考查了对数的运算法则和对数的换底公式、指数幂的运算法则,属于基础题.
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