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)^3-6(x)^2-18x+7-|||-__ __=2(x)^3-6(x)^2-18x+7-|||-__ __=2(x)^3-6(x)^2-18x+7-|||-__ __

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

1.求 =2(x)^3-6(x)^2-18x-7 的单调区间和极值

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

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

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

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) .

A (x,y)=(x)^3-6(x)^2y-3x(y)^2+2(y)^3 . B (x,y)=(x)^3-6(x)^2y-3x(y)^2+2(y)^3 . C

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);-|||