int tan sqrt (1+{x)^2}cdot dfrac (xdx)(sqrt {1+{x)^2}}

(19) int tan sqrt (1+{x)^2}cdot dfrac (xdx)(sqrt {1+{x)^2}}-|||-(20) int dfrac (

(19) int tan sqrt (1+{x)^2}cdot dfrac (xdx)(sqrt {1+{x)^2}}-|||-(20) int dfrac (

#求过程#高数题！！！！救救孩子吧！！！(19) int tan sqrt (1+{x)^2}cdot dfrac (xdx)(sqrt {1+{x)^2}}-

#求过程#高数题！！！！救救孩子吧！！！(19) int tan sqrt (1+{x)^2}cdot dfrac (xdx)(sqrt {1+{x)^2}}-

(int )_(1)^sqrt (3)dfrac (dx)({x)^2sqrt (1+{x)^2}};

(16) (int )_(1)^sqrt (3)dfrac (dx)({x)^2sqrt (1+{x)^2}};

.int dfrac (sqrt {1+{x)^2}+sqrt (1-{x)^2}}(sqrt {1-{x)^4}}dx.

int dfrac ({x)^3}(sqrt {1+{x)^2}}dx,

(9) int dfrac (1)({x)^2sqrt (1+{x)^2}}dx

[题目] int dfrac (xarctan x)(sqrt {1+{x)^2}}dx