(1+(1+X^2)+(1+X^2)^2+(1+X^2)^3+......+(1+X^2)^50)/X^3的餘式
很難喔
收錄日期: 2021-05-02 12:07:37
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20111126000010KK07932