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發表於 2009-3-26 01:29 PM
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pure math
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4 `4 V" e O' `' z& O/ N[250(80x+1)+2y-250]/2 = (250*80x+2y)/2 = (2000x+2y)/2 = 1000x+y
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7 j- c# A$ R2 E% t9 R5.39.217.77if x = 111 y = 2222, you number is 111-2222 |
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