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13. f e" sen bx dx<br />
15. X3 — X2 dX<br />
14.<br />
Introdução à integração 355<br />
ln (ax + b)<br />
dx<br />
"■Iax + b<br />
16. J 1n3 2 x dx<br />
17. j. are tg a x dx 18. 5 x3 sen 4x dx<br />
19. f (x — 1) e' dx 20. f x2 ln x dx<br />
21. f x2 ex dx 22. i arc sen ; dx<br />
23. (x — 1) sec2 x dx J 24. e3x cos 4x dx<br />
25. x"- ln x dx , n E N 26. 5<br />
in(x2 +1)dx<br />
27. ln (x + 1 + x2 ) dx 28. x arc tg x dx<br />
29. dx 30. x cose x dx<br />
31. J (x+ 3)2 ex dx 32. J x + 1 dx<br />
33. cos (ln x) dx 34. arc cos x dx<br />
35. seca x dx 36.<br />
x3<br />
evx dx.