(19) int dfrac (dx)(4-{x)^2}

求下列不定积分int dfrac ({x)^2}(sqrt {4-{x)^2}}dx求下列不定积分

不定积分int dfrac (dx)(4{x)^2-9}=-|||-__.int dfrac (dx)(4{x)^2-9}=-|||-__int dfrac (

(int )_(-2)^2(sqrt (4-{x)^2}+x)dx 等于(　　)等于(　　) A. 0

(({int )_(-2)^2}(x-2)sqrt (4-{x)^2}dx

(int )_(-2)^2(x-2)sqrt (4-{x)^2}dx

(int )_(0)^dfrac (pi {4)}dfrac (x)(1+cos 2x)dx=( ) .(int )_(0)^dfrac (pi {4)}dfr

(4)int dfrac (sqrt {{x)^2-4}}(x)dx;

(24) int dfrac (sqrt {{x)^2-4}}(x)dx

(24) int dfrac (sqrt {{x)^2-4}}(x)dx

( (int )_(dfrac {pi )(4)}^dfrac (pi {3)}dfrac (x)({sin )^2x}dx ;