你在组合公式时，甚至可以用暂时符号来当作变数。

You can even use visual placeholders for variables when you create formulas.

youdao

应用了这两个数学模型，对重复组合公式给出了一个新的证法。

Using two mathematic models, a new demonstrating method is given out for the repeated combination formula.

youdao

依照伽马函数，对通常的阶乘、排列、组合的概念进行了推广，并证明了一些常用的组合公式。

Using gamma function, the paper popularized the common conceptions of the usual factorial, permutation and combination and proved some combination formulas in common use.

youdao

.. I computed the efficient portfolio frontier for various-- it's the efficient portfolio frontier using the formula I just gave you.

我计算了来自不同组合有效边界-,这一条有效投资组合边界,就是用刚刚给出的公式算出来的。

耶鲁公开课 - 金融市场课程节选

Then, once we did that we could plug that into the formula that I gave you last time and get the standard deviation of the portfolio and the expected return on the portfolio.

再将估算出的数值代入到,上节课给你们的公式中,就能得到资产投资组合的标准差,和该投资组合的预期收益率

耶鲁公开课 - 金融市场课程节选

The same formula extends to more assets.

相同的公式可扩展到多个资产的组合。

耶鲁公开课 - 金融市场课程节选