int (x+2)xdx=()A、dfrac(1)(3)(x)^3+(x)^2+CB、dfrac(1)(3)(x)^3+2(x)^2+CC、dfrac(1)(2)(x)^3+(x)^2+CD、2x+2+C

int (x)^3(e)^-(x^2)dx=(,,,,,)A、dfrac(1)(2)(e)^-(x^2)((x)^2+1)+CB、-dfrac(1)(2)(e)

int dfrac (xdx)((x+1)(x+2)(x+3)); ;

int dfrac ({x)^3}({(1+{x)^2)}^2}dx=A.int dfrac ({x)^3}({(1+{x)^2)}^2}dx=B.int df

计算函数极限(1)lim _(xarrow 1)dfrac (x-3)(x+2)(2)lim _(xarrow 1)dfrac (x-3)(x+2)(3)lim

(B) dfrac (1)(2)(X)_(1)+dfrac (1)(2)(X)_(2)-|||-(C) dfrac (1)(2)(X)_(1)+dfrac (1

[题目]求下列函数的反函数:-|||-(1) =dfrac (x+2)(x-2);-|||-(2) =(x)^3+2;-|||-(3) =1+lg (2x-3)

函数(x)=dfrac (1)(3)(x)^3+dfrac (1)(2)(x)^2的单调递增区间是( )A．(x)=dfrac (1)(3)(x)^

已知实数x满足(x)^2+dfrac (1)({x)^2}-3x-dfrac (3)(x)+2=0，求(x)^3+dfrac (1)({x)^3}的值.已知实数

[题目] lim _(xarrow +infty )dfrac ({x)^3+(x)^2+1}({2)^x+(x)^3}(sin x+cos x)= __

函数(x)=(x)^3+(x)^2-x-1的单调递减区间为（ ）(x)=(x)^3+(x)^2-x-1(x)=(x)^3+(x)^2-x-1(x)=(x)