不定积分int (({e)^x+2)}^3(e)^xdx=()A、 int (({e)^x+2)}^3(e)^xdx=()B 、int (({e)^x+2)}^
(int )_(0)^+infty x(2)^-xdx=( )(int )_(0)^+infty x(2)^-xdx=( )(int )_(0)^+inft
.(int )_(e)^x(sin )^2xdx.
.(int )_(e)^x(sin )^2xdx.
(4) int (e)^x(sin )^2xdx.
int t(e)^-2tdt.-|||-.int (ln )^2xdx-|||-.int xsin xcos xdx.-|||-15. int (x)^2(co
(int )_(0)^+infty (x)^3(e)^-2xdx= __
int (x)^2cos xdx.-|||-12. int t(e)^-2tdt..-|||-13.|nn^2xdx.-|||-.fxsin xcos xdx.
int 1(e)^-2tdt-|||-.(int )_(1)^2xdx.-|||-.fxsin xcos xdx.-|||-15. int (x)^2(cos
int x(e)^-3xdx;