asymptote

Slant asymptotes

這裡我們要介紹 slant asymptotes, 也就是所謂的斜漸近線. Section 1: slant asymptotes 斜漸近線定義如下: The line $y=mx+b$, $m\ne 0$, is called a slant asymptote of $f(x)$ if $$ \lim_{x\to\infty} [f(x) - (mx+b)] = 0. $$ Remark: 亦可將上列式子中改為 $x\to-\infty$. 滿足此條