lim(x趋于0时)secx - 1/x^2 ,
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lim(x趋于0时)secx-1/x^2,lim(x趋于0时)secx-1/x^2,lim(x趋于0时)secx-1/x^2,lim(x趋于0时)secx-1/x^2=lim(x趋于0时)secxta
lim(x趋于0时)secx - 1/x^2 ,
lim(x趋于0时)secx - 1/x^2 ,
lim(x趋于0时)secx - 1/x^2 ,
lim(x趋于0时)secx - 1/x^2 =lim(x趋于0时)secxtanx/2x= lim(x趋于0时)secxtan²x+(secx)^3/2
=1/2
lim(x趋于0时)secx - 1/x^2=lim﹙1-cosx﹚/x²cosx=lim﹙x²/2﹚/x²=1/2
lim(x趋于0时)secx - 1/x^2 ,
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