名校
解题方法
1 . 过
轴正半轴上一点
作直线与抛物线
交于
,
,
两点,且满足
,过定点
与点
作直线
与抛物线交于另一点
,过点
与点
作直线
与抛物线交于另一点
.设三角形
的面积为
,三角形
的面积为
.
(1)求正实数
的取值范围;
(2)连接
,
两点,设直线
的斜率为
;
(ⅰ)当
时,直线
在
轴的纵截距范围为
,则求
的取值范围;
(ⅱ)当实数
在(1)取到的范围内取值时,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b62769b7177ef4bc952dc1dd51d6b510.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67f8eb63af65ec83b223ac31f18738cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df332f01628130c084fd46aaca0a4b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c93d889bd26df14fe80111534d9c81d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1440ea23c04adc6e049e57a1de89942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/343a7ab6571ec674d8ec3dd5492fccaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/343a7ab6571ec674d8ec3dd5492fccaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1885efcff0b903e314057dd153578600.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/193b5b41994c2a4dfa5bb0bc984061cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
(1)求正实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed1e9cdd5a82f29ec89b2c53b4fa6f8.png)
(ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37e25b9b8e906fa529f5786091bf2317.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2110c1f8d9858bdbcea63eb6cb3cbd2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed1e9cdd5a82f29ec89b2c53b4fa6f8.png)
(ⅱ)当实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ad5a9147b25285124851a61c7d1a24a.png)
您最近一年使用:0次
2020-05-18更新
|
337次组卷
|
2卷引用:2020届黑龙江省哈尔滨市第三中学高三学年第一次模拟考试理科数学试题
11-12高三上·黑龙江·期中
2 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5611056eaa3c1ba77080bd9a17045ef3.png)
(1)当
时,求函数
的单调区间;
(2)若函数
的图像在点
处的切线的倾斜角为
,问:
在什么范围取值时,函数
在区间
上总存在极值?
(3)当
时,设函数
,若对任意地
,
恒成立,求实数
的取值范围
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5611056eaa3c1ba77080bd9a17045ef3.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/150e8e4ca6aa729a72a6a17c36b8ebfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f18507a11438684e4f6836a8e6021c1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2be3ad3dd6803d92df6ff8a80cd35095.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af101dbbd5cd386d250e04daaba47e05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53224898de85a85058ad336490bbbaa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45c18002839db56a67890102bb53ca20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
您最近一年使用:0次
11-12高三·山东潍坊·阶段练习
3 . 已知
,
,
且
,函数
.
(1)求函数
的单调区间;
(2)若函数
的图象在点
,
(2)
处的切线的斜率为
,问:
在什么范围取值时,对于任意的
,
,函数
在区间
上总存在极值?
(3)当
时,设函数
,若在区间
,
上至少存在一个
,使得
成立,试求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab1d0762d3e1431bdf6e0067d53e4fd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8e2ea42b5e3534905d8cfff749a8439.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f155833b8c37df25a67e628b82ffa2fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f28b08682efa2692b052f64fe1448fce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08c8dce55e1df25b6fb286ca415a5bb2.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ba6841e45d2ab4ee38390b98b538f5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca4ff0af96ea467337cb30c4c765b5f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fb6c6b88c47ffd0a018bf64c5b68a6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45340678c2ec1bc8cd68c0a3a2ab8902.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e37a0d91fae313345dc21078a162764.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28a2eafb3dd274dd9b98d83c38e87802.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8703ba8e5650d3b93872074af40f9b86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f124fb9eab689c537bb5ddf5012e35f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8c98eefb6fcff10193ba39a6fdb13e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d642a28caeb51a77877ea25b46ddbed6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
您最近一年使用:0次
2010·浙江·一模
解题方法
4 . 已知函数![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/5e64765754e44a58816d5b46210b9a89.png?resizew=12)
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/bb267d8852d6434d908feeeec0175a8f.png?resizew=234)
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/5e64765754e44a58816d5b46210b9a89.png?resizew=12)
.
(Ⅰ)求函数
的单调区间;
(Ⅱ)若函数
的图像在点
处的切线的斜率为
,问:
在什么范围取值时,对于任意的
,函数
在区间
上总存在极值?
(Ⅲ)当
时,设函数
,若在区间
上至少存在一个
,使得
成立,试求实数
的取值范围.
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/5e64765754e44a58816d5b46210b9a89.png?resizew=12)
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/bb267d8852d6434d908feeeec0175a8f.png?resizew=234)
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/5e64765754e44a58816d5b46210b9a89.png?resizew=12)
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/5e64765754e44a58816d5b46210b9a89.png?resizew=12)
(Ⅰ)求函数
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/eabb122f339b4673a115fe5493b27314.png?resizew=36)
(Ⅱ)若函数
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/9961606044494457a31de3585628468b.png?resizew=61)
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/d3893716caf54b31b91c6acfd4d61ba2.png?resizew=60)
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/20d90ee520a44200b95624553199767f.png?resizew=9)
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/37649954997f4e31818df3de7b59f01a.png?resizew=17)
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/9409476e3b564e78a828efda9522c030.png?resizew=52)
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/96a5d13fb62749ba9ae7c80cef0bb276.png?resizew=172)
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/18cc7564ddac4050b8a9f2badb6d14d2.png?resizew=32)
(Ⅲ)当
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/f1fb9026bfef46ca8ad18667df9ff3dc.png?resizew=39)
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/35e2ec5761734780b95ccd82108c3ac9.png?resizew=184)
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/02f0912425bf4d37a37ab981974e9134.png?resizew=32)
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/3f65fc70aa3649b0b80daee804cd5bea.png?resizew=19)
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/671a0b8b01324a4082b28231e1c55ee2.png?resizew=95)
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/6ae026eb70fb47c6b9379a339c371c56.png?resizew=16)
您最近一年使用:0次
名校
5 . (1)已知
,不等式
的解集为(0,5).
①求
的解析式;
②若对于任意的x∈[-1,1],不等式
恒成立,求t的取值范围.
(2)若不等式
对满足
的所有
都成立,求
的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212c6ebd9706154afcb5470c82338e63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b817338735d4c23394d6601a7ea4ce.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
②若对于任意的x∈[-1,1],不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930b2eace87389cc50d47d8e86c3f603.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4476ebd7c86f108575c22bc49c24572e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b31cf2caddb8555c14f682e94b79b18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ab4717e4827480f0f6f4ded85e52eab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ffb694021b52653de5141ae27ba6d0.png)
您最近一年使用:0次
名校
6 . 已知函数
.
(1)若f(x)≤0恒成立,求m的范围?
(2)若函数y=|f(x)|在[-1,0]上是减函数,求实数m的取值范围;
(3)是否存在整数a,b,使得a≤f(x)≤b的解集恰好是[a,b],若存在,求出a,b的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aaa4a91f7184a9fbe86aeafa1738d66.png)
(1)若f(x)≤0恒成立,求m的范围?
(2)若函数y=|f(x)|在[-1,0]上是减函数,求实数m的取值范围;
(3)是否存在整数a,b,使得a≤f(x)≤b的解集恰好是[a,b],若存在,求出a,b的值;若不存在,说明理由.
您最近一年使用:0次
名校
7 . 已知函数
.
(1)若
时,
的解集为
时,求实数
的值;
(2)若对任意
,存在
,使
,求实数
的范围;
(3)集合
,若
,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e0be5afa2a9e64ec663846e1b4c1404.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dc9ede2e55724383dd1093fc7fcdb59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bae4f8c44ccb73271388938a6f41c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)若对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec25b9d7ca47b780a744c2ebbf31d925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f851f9849dfe2c3306d20d06f712069d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/018857ec6e498113b3b12a730d9313da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(3)集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/938328f01241661268ca59fa46d75ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79d02e5de0c92487382f4b98376e9740.png)
您最近一年使用:0次
2019-11-08更新
|
237次组卷
|
2卷引用:上海市曹杨二中2019-2020学年高三上学期期中数学试题
名校
8 . 已知函数
(
,常数
).
(1)当
时,求不等式
的解集;
(2)根据
的不同取值,判断函数
的奇偶性,并说明理由;
(3)若函数
在
上单调递减,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a14a2156c6690b324f7929b3b3553970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38f0e9c04402a0ffdaa25c3e3c82c7dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e451f18c97bc90b2216351fd73bf00af.png)
(2)根据
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6c1756b564bf1d998d8179637011c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2019-12-02更新
|
243次组卷
|
2卷引用:上海市进才中学2019-2020学年高一上学期期中数学试题
2011·广东·一模
解题方法
9 . 已知二次函数
,且不等式
的解集为
.
(1)方程
有两个相等的实根,求
的解析式;
(2)
的最小值不大于
,求实数
的取值范围;
(3)
如何取值时,函数
存在零点,并求出零点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2dced5029eebb393f957fffc5027c80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d978026bc6a86caf46b930bffcdc373b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c0ff4fe45a85e9f13a758e3e7aff157.png)
(1)方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f31c543fe10992044c993ec9ddf54f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080278d4c0d2c4e967a991c2f5a26a9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69fc6c10afd996b233bc1dae912ceb15.png)
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10-11高三上·浙江金华·阶段练习
解题方法
10 . 设二次函数
满足
,且对任意实数
,均有
恒成立.
⑴求
的表达式;
⑵若关于
的不等式
的解集非空,求实数
的取值的集合![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
⑶若关于
的方程
的两根为
,试问:是否存在实数
,使得不等式
对任意
及
恒成立?若存在,求出
的取值范围;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ae0872d8d14957d55c723d5ec138a95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7d1a014eb98c5f928d56abc46ea52cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbadc132ecef93a01821ad7ad9d69644.png)
⑴求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
⑵若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e87bd25f0e579fbe9f51c800fcd2769a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
⑶若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cac302207cc784a9c13d2d5b8d848b12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdab3ce88fc3c17e32437dd7fc04fc0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13d2509e1b52b43687d577be80aa2a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48ea85268fba3990417ac0528e4dae0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次