^3-(x)^2-x+1=_____.

求函数 (x)=(x)^3-(x)^2-x+1 的凹凸区间和拐点

13、求函数 (x)=(x)^3-(x)^2-x+1 的凹凸区间和拐点

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

(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

3.已知 (x)=(x)^2-2x+3 , (x)=3(x)^2-x+1, 求下列-|||-(1) (x)+2g(x);-|||-(2) (x)-g(x);-|

lim _(xarrow infty )(3x-sqrt (a{x)^2-x+1})=dfrac (1)(6), 则 a=

设=5(x)^3-(2)^x+3(e)^x+2，则=5(x)^3-(2)^x+3(e)^x+2=( ).A.=5(x)^3-(2)^x+3(e)^x+2

)求下列极限:-|||-(1) lim _(xarrow 1)dfrac ({x)^2-x+1}({(x-1))^2} =-|||-(3) lim _(xarr

^2=9 的充要条件是 () [2分]-|||-A x=3 且 x=-3-|||-B x=3-|||-c x=-3-|||-D x=3 或 x=-3

5.单选题 函数极限lim_(xto1)(2x^2-x+1)/(3x^2)-2x+1=（）A. 0B. 1C. 2D. 3