#無窮級數#高等數學精髓出自貼吧大神baqktdgt,饕餮盛宴+冪級數求和函數sum(n,0,∞)((2n)!!x^(2n+1))/(2n+1)!!雙階乘,#微分方程#常數變易法f(x)=arcsinx/√(1-x²)。#HLWRC高數#土話天道酬勤先寫xia勿要問。 http://t.cn/A6bzOSFd 。室內走路默念數字,每一百就彎曲一根手指。微博@海離薇。
#無窮級數#高等數學精髓出自貼吧大神baqktdgt,饕餮盛宴+冪級數求和函數sum(n,0,∞)((2n)!!x^(2n+1))/(2n+1)!!雙階乘,#微分方程#常數變易法f(x)=arcsinx/√(1-x²)。#HLWRC高數#土話天道酬勤先寫xia勿要問。 http://t.cn/A6bzOSFd 。室內走路默念數字,每一百就彎曲一根手指。微博@海離薇。
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