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Let's say this is r1, this is r2 r1 r2 r3 r4 and then this will be r3 and this will be r4.
那么我们可以2,依次把它们称为。
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The return on the portfolio is x1 r1 + x2 r2 + x3 r3.
这个投资组合的收益是。
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If I look at something that goes as n squared, if this is the edge of the nucleus here and if this is r1, 4 it says when n goes to two the radius goes to four.
如果在原子核外侧,我们发现某一半径和n的平方成正比，也就是说当n为2时半径等于。
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r1 Asset 1 has expected return r1.
第一项资产的预期收益率是。
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I don't have the data in front of me, so let's emphasize the difference between r1 and rf.
我现在手头没有具体数据，我们现在把目光转移到r1和rf的数值差上。
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, r1, and r2 for those and I plugged it into that formula, which we just showed.
我计算了σ1，σ2，r1和r2，I，computed，the，σ1，，σ,代入我们刚刚展示的公式。
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r1 is the yield on the one-period bond and r2 is the yield on the two-period bond.
1是一年期债券的收益率,r2则是两年期债券的收益率
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