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来源: jmjmjm 于 2010-01-06 23:07:04 [] [旧帖] [给我悄悄话] 本文已被阅读： 次 (127 bytes)
I have an equation:
Y=Yo+a*(1-exp(-b*X))+c*(1-exp(-d*X))

How to convert to equation: X=?

Thanks for your help.
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