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)^3+dfrac (1)(2)(x)^2B．(x)=dfrac (1)(3)(x)^3+dfrac (1)(2)(x)^2C．(x)=dfrac (1)(3)(x)^3+dfrac (1)(2)(x)^2D．(x)=dfrac (1)(3)(x)^3+dfrac (1)(2)(x)^2

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

设x是非零实数,则 ^3+dfrac (1)({x)^3}=18-|||-__-|||-(1) +dfrac (1)(x)=3-|||-(2) ^2+dfrac

2.求下列函数的导数:-|||-(1) =(x)^3+dfrac (7)({x)^4}-dfrac (2)(x)+12 ;-|||-(2) =5(x)^3-(2

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

(x)=dfrac (1)(3)(x)^3-(x)^2-8x+1的单调增加区间是( )(x)=dfrac (1)(3)(x)^3-(x)^2-8x+1(x)=d

已知函数 (x)=-dfrac (1)(2)(x)^2+3x-2ln x，则函数 (x)=-dfrac (1)(2)(x)^2+3x-2ln x的单调递

(4) (x)=(x)^3-(x)^2-x+1 满足 () .-|||-(A)在 (-infty ,-dfrac (1)(3)] 内单调递增 (B)在 [ d

dfrac (1)(5)(X)_(1)+dfrac (2)(5)(X)_(2)+dfrac (2)(5)(X)_(3)-|||-D .dfrac (1)(7)(

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

lim _(xarrow 1)(dfrac (a)(1-{x)^2}+dfrac (x)(x-1))=dfrac (3)(2) = __