int dfrac (3)({x)^3+1}dx
不定积分int dfrac ({x)^3+1}(3+x)dx=_____________不定积分_____________
(44) int dfrac ({x)^3+1}({({x)^2+1)}^2}dx,
(43) int dfrac ({x)^3+1}({({x)^2+1)}^2}dx ;
int dfrac (2{x)^2-x-1}({x)^3+1}dx.
(44) int dfrac ({x)^3+1}({({x)^2+1)}^2}dx.
(44) int dfrac ({x)^3+1}({({x)^2+1)}^2}dx.
int ((x)^3+1-dfrac (1)(x))dx=( ) A int ((x)^3+1-dfrac (1)(x))dx= B int ((
int dfrac ({x)^3}({(1+{x)^2)}^2}dx=A.int dfrac ({x)^3}({(1+{x)^2)}^2}dx=B.int df
int dfrac (1)({x)^2}sin dfrac (3)(x)dx= __