想問幾題~

2008-02-18 2:36 am

希望各位可以幫幫忙~~

回答 (2)

2008-02-18 4:05 am
2008-02-18 3:26 am
2.

x/y + x/y = 1

2x/y = 1

x/y = 1/2

y/x = 2

所以y/x + y/x = 4 -.-?

2008-02-17 19:26:52 補充:
未學的..試下做..


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