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根据该衍生物得到
x的定义趋向于0,[1-COS(X ^ 2)] /(1-cosx)限制
= [COS0 ^ 2-余弦(χ^ 2)] / (COS0-cosx)限制
= X {[COS0 ^ 2-COS(X ^ 2)] /(0 ^ 2-X ^ 2)}由
[(COS0-cosx)/分(0- x)的]乘以极限
= X余弦(χ^ 2)的衍生物/ cosx数目限制
= X * [ - 2sin(χ^ 2)} /( - sinx的)极限
= 2sin(X ^ 2)* [X / sinx的]限
= 2sin(X ^ 2)* [(X-0)/(sinx的-SIN0)]只
= 2sin(X ^ 2)* [ 1 /(sinx的导数)]只
= 2sin(X ^ 2)*(1 / cosx)限制
= 2sin(0 ^ 2)*(1 / COS0)= 0
x的定义趋向于0,[1-COS(X ^ 2)] /(1-cosx)限制
= [COS0 ^ 2-余弦(χ^ 2)] / (COS0-cosx)限制
= X {[COS0 ^ 2-COS(X ^ 2)] /(0 ^ 2-X ^ 2)}由
[(COS0-cosx)/分(0- x)的]乘以极限
= X余弦(χ^ 2)的衍生物/ cosx数目限制
= X * [ - 2sin(χ^ 2)} /( - sinx的)极限
= 2sin(X ^ 2)* [X / sinx的]限
= 2sin(X ^ 2)* [(X-0)/(sinx的-SIN0)]只
= 2sin(X ^ 2)* [ 1 /(sinx的导数)]只
= 2sin(X ^ 2)*(1 / cosx)限制
= 2sin(0 ^ 2)*(1 / COS0)= 0
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但书上答案是e啊?_?
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