函数的异阶导数揭示了变化率的深层次特征，助我们理解其行为。

歌词千寻NothingBetterThanYou-DenitaGibbs.IcanbetherichestwomanonearthButletmetellYouIt'snotbetterthanYou,ohThat'snotbetterthanyouAndIcanhavethefinestthingsinlifeButletmetellYouIt'snotbetterthanYou,It'snotbetterthanYou,oh.IcanbesittingontopoftheworldDrapedindiamondsandpearlsButthat'snotbetter,that'snotbetterthanYou,NotbetterthanYouIcaneventravelfromplacetoplaceWhereeverybodylovesmyfaceButthat'snotbetter,that'snotbetterButthat'snotbetter,that'snotbetterthanYouIfI'munder,LordbringmeoverIwannabenearer,closertoYouYouarelightandYouaretruthThere'snothingbetter,betterthanYou.IcanbethemostprestigiouspersonintheworldLetmetellYouThat'snotbetterthanYouThat'snotbetterthanYouAndIcanh

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