问题
选择题
|
答案
∵
-3x2-5x 2x-4
=1 x-2
=(3x +1)(x-2) 2x-4
(3x+1)1 2
∴
(lim x→2
-3x2-5x 2x-4
)=1 x-2 lim x→2
(3x+1)=1 2 7 2
故选C
|
∵
-3x2-5x 2x-4
=1 x-2
=(3x +1)(x-2) 2x-4
(3x+1)1 2
∴
(lim x→2
-3x2-5x 2x-4
)=1 x-2 lim x→2
(3x+1)=1 2 7 2
故选C