H
hoaseru
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
U1=2
U(n+1)+5Un+3
[tex]Sn=1.5+3.5^2+5.5^3+.....+(2n-1).5^n[/tex]
__
Viết có dấu !
U(n+1)+5Un+3
[tex]Sn=1.5+3.5^2+5.5^3+.....+(2n-1).5^n[/tex]
__
Viết có dấu !
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