[题目] int dfrac (x)(sqrt {1-{x)^2}}dx

[题目]-|||-int (dfrac (3)(1+{x)^2}-dfrac (2)(sqrt {1-{x)^2}})dx

(6) () =dfrac (1)(sqrt {1-{x)^2}} int dfrac (1)(sqrt {1-{x)^2}}dx=() .

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

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

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

(15) int dfrac ({x)^2}(sqrt {1-{x)^2}}dx

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

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

例24 int dfrac (dx)(x+sqrt {1-{x)^2}}

【题目】-|||-求下列不定积分:-|||-int dfrac (x+2)({x)^2sqrt (1-{x)^2}}dx ;