[微積] 漸進線
x - 9
f(x) = -------------------- 求漸進線
(4x^2 + 3x +2)^1/2
我算出來 y = 1/2
可是答案還多了一個 y = -1/2
多出來的 y = -1/2 是怎麼算的啊?
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