Discuz Math Forum»Forum › Mathematics › High School › 求函数的值域

Return to list New

View 313|Reply 2

[函数] 求函数的值域

[Copy link]

10 Threads	3 Posts	110 Credits

Credits: 110

Send PM

yoyo987654 Posted 2023-11-7 22:57 |Read mode

请教方法

Reply Edit

25 Threads	1011 Posts	110K Credits

Credits: 12665

Send PM

战巡 Posted 2023-11-8 14:43

\[y=\frac{sign(x)}{\sqrt{1+\frac{2}{x}+\frac{4}{x^2}}}\]
剩下就是分$x\ge 0$和$x<0$慢慢研究

Reply Edit

107 Threads	225 Posts	2905 Credits

Credits: 2905

Send PM

facebooker Posted 2023-11-9 19:04

判别式法或者三角换元

Reply Edit

Return to list New

Mobile version|Discuz Math Forum

2025-5-31 11:18 GMT+8

Powered by Discuz!

× Quick Reply To Top Edit