1. π20sin2xcosxdx

2. π20esin2xsinxcos3xdx 

3. π20101cos5xsinxcos9xdx

4. ln5ln2dx(10ex1)ex1 


5. π43π4(tan2xtanx)exdx

6. 012dx1+x(1+x) 

7. 11dx1+x+x2+x4+3x2+1 

8. 42ln(9x)ln(9x)+ln(3+x)dx 

9. π4π6cos2xsin3xsin(x+π4)dx 

10. 3ln20dx(3ex+2)2 

11. e1ln2x+lnx(lnx+x+1)2dx 

12. ln3ln2e2xdxex1+ex2 

13. 10dx5(1+x5)6 
 
câu cuối cung bạn hãy vào 'toán học tưởi trẻ'số 395 để xem cách giải tỏng quát nha.//.. –  nhutuyet12t7.1995 15-01-13 07:38 PM
Đề nghị bạn khi lần sau đăng câu hỏi thì Mỗi một phần chỉ dc đặt 1 câu hỏi thui nhé, không đặt nhìu câu hỏi trong 1 phần thế này.thanhk. BQT –  hoàng anh thọ 12-01-13 10:43 AM
1) Sin2xCosxdx=2SinxCosxCos12dx=2Cosx32d(Cosx) tp cơ bản .
ta có :Π/43Π/4tan2x.exdx+Π/43Π/4tanx.exdx=I1+I2
 tính I1=Π/43Π/4(1cos2x1).exdx     (đến đây bạn tích phân từng phần là đc thui)
tính I2 =   - Π/43Π/4ex.d(cosx)cosx
(bạn tính tiếp nha ) 

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