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(x+dfrac (1)(x))=(x)^2+dfrac (1)({x)^2}-3，求f(x)已知，求f(x)

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

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)^

【题文】已知(x+dfrac (1)(x))=(x)^2+dfrac (1)({x)^2}，求(x+dfrac (1)(x))=(x)^2+dfrac (1)(

... +({X)_(n)}^2)-|||-;(5) (mu )^2+dfrac (1)(3)((X)_(1)+(X)_(2)+(X)_(3))-|||-;(6

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

设 (x+dfrac (1)(x))=(x)^2+dfrac (1)({x)^2}, 则 lim _(xarrow 3)f(x)= __

设dfrac(x)({x)^2 -3x+1} =1，求dfrac({x)^3}({x)^6-27(x)^3+1}的值.设$\dfrac{x}{{x}^{2} -

已知 =f(dfrac (3x-2)(3x+2)) (x)=arcsin (x)^2 ,求 dfrac (dy)(dx)(|)_(x=0).

已知关于x的方程 ^2+(2k-3)x+(k)^2-3=0 有两个实数根x1,x2,且 _(1)+(x)_(2)=dfrac (1)({x)_(1)}+dfra