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son_9x1
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
tinh tich tich phan
dx o tu day,em khong biet ghi
[FONT="][/FONT]
[tex]\int\limits_{0}^{\pi/2}(sinx-cosx+1)/(sinx+2cosx+3)dx[/tex]
dx o tu day,em khong biet ghi
[FONT="][/FONT]
[tex]\int\limits_{0}^{\pi/2}(sinx-cosx+1)/(sinx+2cosx+3)dx[/tex]
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