Re: [考古] 淡大商管93轉學考
※ 引述《leetingyu (陽光溺水男孩)》之銘言:
: 1.
: |x-4|
: lim————=
: x→2- x-4
|x-4|
lim --------
x→2- x - 4
-(x-4)
= lim -------- (x→2- , x - 4 < 0 => -(x-4) > 0)
x→2- x-4
= lim -1 = -1
x→2-
--
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