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顯然在x趨於0的時候,tanx等價於x,ln(1+x)等價於x,所以分母(tanx)^2 *ln(1+2x)等價於x^2 *2x=2x^3而分子e^x -e^sinx=e^sinx * [e^(x-sinx)-1]那麼sinx趨於0,e^sinx趨於1,而x等價於sinx,即x-sinx趨於0,所以e^(x-sinx)…
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