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In high numbers, the derivation process of asymptotes (horizontal, vertical and oblique asymptotes) should be detailed.

If the horizontal asymptote is lim (x->; Infinity) f(x)=a, then the asymptote is y = a.

If the vertical asymptote is lim (x->; X0)f(x)= positive or negative infinity, then the asymptote is x=x0.

Oblique asymptote iflim (x->; Infinite) f(x)/x=a，lim(x-& gt； Infinity) f(x)-ax=b, then the asymptote is y = ax+b.

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