在平面直角坐标系
中,直线
与函数
和
均相切(其中
为常数),切点分别为
和
,则
的值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0713200d5e24930dab29abeaea1a2fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c359b43cc5c84f601f1a32d1766393e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6ff82ebdfad5e7de1c7487b0b817a7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a53e311ee0b5085e7e5a45c606daa5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/450398974b1561ca801e102e16df6789.png)
更新时间:2017-10-15 20:53:12
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相似题推荐
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名校
【推荐1】数列
各项均是正数,
,
,函数
在点
处的切线过点
,则下列四个命题
①
;
②数列
是等比数列;
③数列
是等比数列;
④
.
正确的是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ea8d0e50065114b05ef2dc1ea1129cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae8aa3e510f891053e546b003d70eec2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ac75c24c046868cb6170f5a6e94a80b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9551e26a9fe6cb4a83be3943e2ff3a0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2502d1cfa9082252d661ffaf97db0460.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b3b533faaa7020cb07b0357a7089100.png)
②数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa0dc13236eaa2bd0cdc0f24beea11fe.png)
③数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e0f439a2c04c1bd4bd9518e0adf893f.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbb2f1272b626e0fd5c79c1a91d48b07.png)
正确的是
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【推荐2】阅读材料:
求函数
的导函数
解:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/741f562cae9bd752d0994622f6683365.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7c8c93c60aeeed63ecc9962c21ddbc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecdb2db020aafa9b6b19cd8467bb74ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95928ee158a51ef9bfac884a56fdbd5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/211554936b5e199a618cb441817ed412.png)
借助上述思路,曲线
,
在点
处的切线方程为__________ .
求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c236fb686d41d3284583802d271fcb8.png)
解:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/741f562cae9bd752d0994622f6683365.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7c8c93c60aeeed63ecc9962c21ddbc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecdb2db020aafa9b6b19cd8467bb74ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95928ee158a51ef9bfac884a56fdbd5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/211554936b5e199a618cb441817ed412.png)
借助上述思路,曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88594bad02ddf29d9adc2048ec79586f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68e1a91b3a8e221e64eebd688bb7896e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e76ac0321cc020dca13c3cf92a6e1e9b.png)
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解题方法
【推荐1】曲线
与
在公共点处有相同的切线,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d5a21a9679a87c3e244d0ea6fcae7fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aef469c7b7cb9945b984222381b9c000.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
您最近一年使用:0次
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【推荐2】已知点
在曲线
上,点
在直线
上,则
的最小值为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c23447056c08b48347471ee175b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e23fc11a3a7592c68b20f93bdde2ed3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/084cf5ffced059f5653ee2a1023518b7.png)
您最近一年使用:0次
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【推荐3】已知函数
,若存在一条直线同时与两个函数图象相切,则实数a的取值范围__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc4b72ecf2497cf2195af640d389d094.png)
您最近一年使用:0次