等效無窮小或羅必達
原式=lim ax/bx =a/b
x-->0
原式=lim(cosax*a)/(cosbx*b)=a/b
x--->0
l i m sinax x → 0------------ sinbx
l i m sinax x → 0------------ sinbx
數(shù)學(xué)人氣：603 ℃時間：2020-09-28 18:38:27
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