勁簡單數學題!!!請快答我 急!!!!
回答 (4)
2014-05-02 5:07 am
y^（2）+y^（2）=y^（4）
2014-05-01 10:48 pm
你可以設 x=y^2
y^2+y^2
= x+ x
= 2x
∵ x=y^2
∴ y^2+y^2
= 2(y^2)
= 2y^2
y^2+y^2
= x+ x
= 2x
∵ x=y^2
∴ y^2+y^2
= 2(y^2)
= 2y^2
2014-05-01 9:20 pm
=2y^2...............
收錄日期: 2021-04-13 21:22:08
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20140501000051KK00046