3.确定下列函数的单调区间:-|||-(1) =2(x)^3-6(x)^2-18x-7 ;

3.确定下列函数的单调区间:-|||-(1) =2(x)^3-6(x)^2-18x-7 ;-|||-(2) =2x+dfrac (8)(x)(xgt 0) .

确定下列函数的单调区间:-|||-(1) =2(x)^3-6(x)^2-18x-7 ;-|||-(2) =2x+dfrac (8)(x)(xgt 0);-|||

1.求 =2(x)^3-6(x)^2-18x-7 的单调区间和极值

2.函数 f(x)=2x^3-6x^2-18x-7 的单调递减区间是()A. (-∞,-1)B. [-1,3]C. (3,+∞)D. -3,1

3.【单选题】求函数=2(x)^3-6(x)^2-18x+7-|||-__ __的极值。（）=2(x)^3-6(x)^2-18x+7-|||-__ __=2(x

1.求下列函数的极值.-|||-(2) =2(x)^3-6(x)^2-18x+7 ;-|||-__

5.求函数 =(x)^3-6(x)^2+9x-5 的单调区间和极值.

确定下列函数的单调区间： =ln (x+sqrt (1+{x)^2})确定下列函数的单调区间：

1.求下列函数的极值:-|||-(1) =2(x)^3-6(x)^2-18x+7 ;-|||-(2) =x-ln (1+x) ;-|||-(3) =-(x)^4

1.求下列函数的极值:-|||-(1) =2(x)^3-6(x)^2-18x+7 ;-|||-(2) =x-ln (1+x) ;-|||-(3) =-(x)^4