A single factorial experiment was conducted to develop a method of ripening and softening fresh berries of pepper (Pipper nigrum Linnaeus) by using Ethephon.
采单因子试验法,初步研烯催熟软化胡椒鲜果的方法。
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And if you think, this is 2 factorial.
如果你认为,这是 2 阶乘。
This is 4 factorial, 6 minus 2 is 4 factorial.
这是4阶乘,6减2是4阶乘。
If this was 7 over 7 minus 2 factorial we would have 7 times 6.
如果这是 7 除 7 减 2 阶乘,我将有 7 乘 6。
Instead of factorial time, it takes linear time.
它不是阶乘时间, 而是线性时间。
So k factorial could be written as k times k minus 1 factorial.
所 k 阶乘可写成 k 乘 k 减 1 阶乘。
So 6 factorial divided by 6 factorial, those cancel out.
所 6 阶乘除 6 阶乘,那些抵消了。
Once again, you'll have to know that 0 factorial is equal to 1.
再一次,你必须知道 0 的阶乘等于 1。
So this could be rewritten as k times k minus 1 factorial.
所这可改写为 k 乘 k 减 1 阶乘。
And here we can make a little bit of a simplification because what's k divided by k factorial?
在这里我可稍微简化一下,因为 k 除 k 的阶乘是多少?
So we could rewrite n factorial using the same trick up here.
所我可在这里使用相同的技巧重写 n 阶乘。
It approximates factorials with essentially a continuous function.
它近似于具有连续函数的阶乘。
So 0 factorial divided by 10 minus 0 factorial.
所 0 阶乘除 10 减去 0 阶乘。
But 0 factorial is actually-- so that it works out properly is defined to be equal to 1.
但是 0 阶乘实际上是——所它正确地算出来被定义为等于 1。
That's all this factorial stuff here.
这就是所有这些阶乘的东西。
Times n minus k factorial times p to the k times 1 minus p to the n minus k.
乘 n 减 k 阶乘 p 到 k 乘 1 减 p 到 n 减 k。
So 10 factorial, that's kind of the number of trials I have.
所 10 阶乘,这就是我的试验次数。
So we'll take the factorial of 6 and we'll divide it by-- put a parentheses here.
所我将取 6 的阶乘,然后将它除 -- 在这里放一个括号。
If this had 3 we would do 3 factorial, and I'll show you how that can happen.
如果它有 3,我会做 3 个阶乘,我会告诉你这是如何发生的。
5 factorial is 5 times 4 times 3 times 2 times 1.
5阶乘是5乘4乘3乘2乘1。
And actually, it turns out that it's 2 factorial.
实际上,它是 2 的阶乘。
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