题目
题型:解答题难度:一般来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061834-69540.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061835-45667.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061835-82975.png)
(2)解关于
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061835-39212.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061835-29442.png)
(3)设
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061835-36244.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061836-11684.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061836-72748.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061836-55002.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061836-89759.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061837-24220.png)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061837-12419.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061837-37759.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061837-22374.png)
若
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061837-67997.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061838-79998.png)
若
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061838-18341.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061838-66763.png)
(3)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061838-31964.png)
解析
试题分析:
(1)利用换元法求解函数的解析式,设
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061838-47810.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061839-63067.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061839-69422.png)
(2)依题意将方程
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061839-86765.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061839-92898.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061839-15790.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061840-63932.png)
(3)对任意
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061840-62992.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061840-55649.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061840-62992.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061840-24670.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061840-41457.png)
试题解析:解:(1)令
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061841-15649.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061841-84210.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061841-77124.png)
即
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061837-24220.png)
(2)由
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061835-29442.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061841-88625.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061841-23423.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061837-12419.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061837-37759.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061837-22374.png)
若
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061837-67997.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061838-79998.png)
若
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061838-18341.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061838-66763.png)
(3)对任意
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061836-72748.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061836-55002.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061841-96567.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061842-24870.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061842-25107.png)
令
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061842-69316.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061842-69873.png)
令
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061842-14867.png)
①当
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061838-18341.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061842-14867.png)
此时
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061843-83536.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061843-72293.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061843-42626.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061843-95910.png)
②当
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061843-40291.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061842-14867.png)
此时
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061843-83536.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061843-72293.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061843-42626.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061843-95910.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061844-22625.png)
③当
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061844-14251.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061842-14867.png)
在
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061844-97054.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061844-44589.png)
且
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061844-52062.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061845-60121.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061845-14012.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061845-38828.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061845-53020.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061845-19802.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061838-31964.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061832-74807.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061831-64149.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061829-33958.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061829-19188.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061829-25474.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061821-31308.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061817-83184.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820061817-65487.png)
最新试题
- 1唐人街是( )因素对住宅选择影响的结果A.种族B.收入C.交通D.知名度
- 2彼得·克鲁兹认为“在公元前二世纪罗马进行地区扩张重要历史时期,她吸收和修正了希腊思想和哲学,造就了几近完美的一个制度,它
- 3某白色粉末可能含有NaOH、Na2CO3,Na2SO4、NaCl中的一种或几种。为探究白色粉末的成分,将该粉末放入足量水
- 4下列操作中,能使电离平衡H2O⇌H++OH-,向右移动且溶液呈酸性的是( )A.向水中加入NaHSO4溶液B.向水中加
- 5关于电源电动势,下列说法中正确的是:( )A.同一电源接入不同的电路电动势会发生改变B.电源电动势就是接入电源两极
- 6在硝酸铜、硝酸银混合溶液中,加入一定量的锌粉,充分反应后有固体存在.过滤,取滤纸上的固体物质加入稀盐酸,固体不发生变化.
- 7无论m取何值,y=x+2m与y= -x+4的交点不可能在 ( )A.第一象限B.第二象限C.第三象限D.第四象限
- 8反应C(s)+H2O(g)CO(g)+H2(g)在一可变容积的密闭容器中进行,达到平衡,下列条件能使平衡移动的是(
- 9下列有关聚落差异的叙述,正确的是( )A.世界各地自然环境没有差异,只是民族生活习惯不同,建筑风格不同B.由于自然环境
- 10作文阅读下面的材料,按要求作文。(60分)近年来,一些中小型实体书店纷纷***。据统计,伦敦、纽约、东京每平方公里拥有实体
热门考点
- 1图为一列简谐横波t时刻的波形图,已知该波的周期为T,波长为L,a、b、c、d为4个质量相等的振动质点,下列判断正确的是(
- 2已知Ba(AlO2)2可溶于水。下图表示的是向含A12(SO4)3 0.01mol的溶液中逐滴加入Ba(OH)2溶液时,
- 3我国冬季南北温差大的主要原因是[ ]A、地形因素 B、河流因素 C、纬度因素 D、冬季风
- 4已知函数的递增区间是① 求的值。② 设,求在区间上的最大值和最小值。
- 5— ______does it take him to come to work by train? — An hour
- 6已知中,角,,所对的边分别为,,,且满足(1)求角;(2)若,,求,的值.
- 7废旧印刷电路板的回收利用可实现资源再生,并减少污染.废旧印刷电路板经粉碎分离,能得到非金属粉末和金属粉末.(1)写出工业
- 8小红觉得自己长得胖,学习成绩又不好,总是沉默寡言,她很想和同学交流,又怕同学瞧不起自己。小红的这种心理是________
- 9如图所示的电路中,当闭合开关S后,发现两灯都不亮,电流表指针几乎指在“0”刻度线不动,电压表指针则有明显偏转,该电路中故
- 10现有乙炔、乙醛、乙二醇三种蒸汽的混合物,已知含C量为a%,则氢的含量为A.% B.% C. D.无法计算