Quick question on high order term such as (dx)^2(adsbygoogle = window.adsbygoogle || []).push({});

in taylor expansion, higher order terms such as (dx)^2 is ignored because it's too small compared to the first order term...

if there is no first order term, can second order term still be ignored?

eg. if y=(dx)^2, do we always assume y=0 because (dx)^2 is too small?

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# Differential squared

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