求dfrac (d)(dx)[ (int )_(2)^eln xdx] =________.

28、 dfrac (d)(dx)(int )_(1)^2arctan xdx= __-|||-_

求 (int )_(0)^dfrac (pi {2)}(e)^2xcos xdx求

int t(e)^-2tdt.-|||-.int (ln )^2xdx-|||-.int xsin xcos xdx.-|||-15. int (x)^2(co

2.求下列不定积分:-|||-(1) int dfrac (dx)({x)^2};-|||-(2) int xsqrt (x)dx; 2.求下列不定积

int 1(e)^-2tdt-|||-.(int )_(1)^2xdx.-|||-.fxsin xcos xdx.-|||-15. int (x)^2(cos

例2 求 int dfrac (dx)(1+{x)^2} =

求int dfrac (1)({x)^2-x-2}dx求

求(int )_(0)^2dfrac (dx)({(1-x))^2}求

求不定积分int dfrac (1)(2x)sqrt (ln x)dx=（）.int dfrac (1)(2x)sqrt (ln x)dx=int dfrac

填空:-|||-(1) int (x)^3(e)^xdx= __ ;-|||-(2) int dfrac (x+5)({x)^2-6x+13}dx= __