[微積] 漸近線

[c8c96387 (欸欸欸)]

請問一下這題的漸近線是什麼
https://i.imgur.com/3OCvijM.jpg
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推 kennings    : as x approaches +infinity, 1/x approaches 0,
→ kennings    : use Maclaurin expansion of sin(1/x)=1/x-1/6x^3+-
→ kennings    : to visualize that (one of)the asymptotic lines
→ kennings    : is y=x^2*1/x=x, similarly y=-x also fits
→ kennings    : sorry, I withdraw the answer of y=-x