(1)已知
,
,且
,求
值;
(2)求值:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9caff846b9d2d4ea37b7df76719c68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/872be4645b9ccafc2744f8c822d17005.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a5abe56c019ac914e1fcde1865a747.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/577ed0748e1a07bb8a10532f4a9e4fb5.png)
(2)求值:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37f9b098f84a5e4e7a4815dd203df232.png)
更新时间:2020-11-13 16:02:57
|
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解答题-计算题
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适中
(0.65)
解题方法
【推荐2】(1)求值:
;
(2)已知命题
,命题
,命题
,若
是
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是
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6630ea4cfb727aac6bef6d7916f5f0bd.png)
(2)已知命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02733a04f5cd3bc7c0fdd2d26fe2277c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bda60d483cee4e84a3c2653ff3880065.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ef1685a1b90bdb22f56d727736288ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解答题-问答题
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【推荐1】(1)某食品的保鲜时间y(单位:小时)与储藏温度x(单位:℃)满足函数关系
自然对数的底数,k,b为常数),若该食品在0℃的保鲜时间是192小时,在22℃的保鲜时间是48小时,求该食品在33℃的保鲜时间.
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名校
【推荐2】(1)已知lg 2≈0.3010,lg 3≈0.4771,求lg
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280e36eef811c4ef5056fe859d2cc896.png)
(2)甲乙两人同时解关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0aaa19ab0a7773e57559353aee2fd59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/158b045c6172c4178d7aa52083e1489f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c921b2ca2d7e54227cd8e069391a1a5.png)
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