计算求值:
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d265700917bf7abf1ce6ac9f015d9992.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e885f966ed537e7e29c206404a522cf.png)
更新时间:2022-11-15 22:50:05
|
相似题推荐
解答题-问答题
|
较易
(0.85)
【推荐1】(1)根据所学知识推导如下的对数运算性质:如果
,且
,
,那么
;
(2)请你运用(1)中的对数运算性质计算
的值;
(3)因为
,所以
的位数为4.请判断
的位数.
(参考数据:
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2480f87a11c4cd450bc9454ea7276722.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8905be1335a8703769b0ad90eb6b1603.png)
(2)请你运用(1)中的对数运算性质计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d04fb0e77ae84eac3778e2515e07ff0.png)
(3)因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/debc5f7846c70bdfb5911af22b83558f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5bdc4ab4fd3f97dc0fd63038015386.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f2abb999bee661ea9205f53929dba24.png)
(参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebcfc8a043df942e0e5ba98e8a7177fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e4bfa2257cdada6ae17400d048f9edf.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
解题方法
【推荐2】比较下列各组数的大小.
(1)
与
;
(2)
与
;
(3)
与
;
(4)
与
(
且
).
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2de86ba5db3a94aede422bfe91a29a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50869d67e743a242196c2d30bfca2f2.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99fb2fd79381a4b8815cf115e14ac5c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e579946e27216ac3a2976c35ba6854f.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7634c45c9a8f50933e6020167f435e9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1675c8aa7e68d0211ef06e8065ae0ace.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5196bb63e7e7c2c8acb8c4940303f658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87d38072d78e78856337e56a2a4f48f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
您最近一年使用:0次