If the density function is fa(t) and fb(t) where 10<=t<=11
所在版块:求学狮城 发贴时间:2005-02-20 21:53  评分:

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then the answer is a double integral on fa and fb

\int\int|ta-tb|<1/3 {f(ta)*f(tb)} dta dtb


use two step integral to do it

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