Forgot password
 Register account
View 301|Reply 1

[函数] 我这个导数证明的对不对?

[Copy link]

41

Threads

60

Posts

0

Reputation

Show all posts

baxiannv posted 2022-4-23 01:44 |Read mode
Last edited by hbghlyj 2025-3-9 05:43

22.(本题满分 12 分)
已知函数 $f_a(x)=e^x+a x+a$ ,直线 $l: y=k x$ .对于给定的实数 $k$ ,总存在两个不同的实数 $a_1$ 和 $a_2$ ,使得直线 $l$ 与曲线 $y=f_{a_1}(x)$ 和曲线 $y=f_{a_2}(x)$ 都相切.
(1)求实数 $k$ 的取值范围;
(2)求证:$a_1+a_2>2\left(k-\frac{1}{e}\right)-\left(1-\frac{2}{e}\right) \sqrt{1+e k}$ .
第二问

24

Threads

1014

Posts

46

Reputation

Show all posts

战巡 posted 2022-4-23 01:57
回复 1# baxiannv


..........
你这写的跟鬼画符一样,东一块西一块逻辑不清晰,看不懂

Quick Reply

Advanced Mode
B Color Image Link Quote Code Smilies
You have to log in before you can reply Login | Register account

$\LaTeX$ formula tutorial

Mobile version

2025-7-15 14:14 GMT+8

Powered by Discuz!

Processed in 0.013908 seconds, 23 queries