Question

（a-b)^5=? (a-b)^n=? (a+b)^n=? 能推出来吗？ 怎么推出来的？ 详细解答！！！

（a-b)^5=? (a-b)^n=? (a+b)^n=? 能推出来吗？ 怎么推出来的？
详细解答！！！

Answer 1

Economical Methods to obtain Louboutin Shoes

Louboutin Shoes

Sometimes they do not care to spend a great deal behind these stuffs. However,Christian Louboutin Sandals, these fashionable collections are not usually that easy to get. As these issues range from brains of brilliants,Christian Louboutin Mens, they will price a lot. For instance we can mention Christian Louboutin shoes. Shoes created by Louboutin are extremely costly. You will need to pay about four hundred dollars to 3 thousand dollars. It's almost impossible for numerous ladies to spend this amount of cash following a mode material.

Many ladies have cherished the dream to have a pair of these shoes. But being costly they are away from their reach. However,louboutin womens shoes, there is a solution for this problem. There's a fantastic extensive price provide to suit your needs. You can select any shoe you want and have them within an incredible price. Everyone recognizes that Christian Louboutin shoes are high quality in designs and quality. Also they have an exceptional prestige for becoming products of a well-known designing brand. Is not it great which you may have one or more pair of these footwear within an economical price? All you have to do is appear in the dependable website for that unique purpose and purchase them.

There's also another way having these Christian Louboutin created shoes in a great cost. You will find some shoes produced in China,Christian Louboutin Flats, Italy & France. They're reproductions of original Louboutin goods. They're made from the authentic Louboutin designs. These shoes are extremely good looking. You will also find them top in class. These sneakers satisfies your demand of Christian's shoes. They've every one of the looks and glamour of the original shoes but these replica footwear is much cheaper compared to real ones.Reproduced footwear is beautifully made with care and sincerity. To create these footwear,Christian Louboutin Peep Toe, high quality leather is utilized. They have the Christian's signature on the soles. You'll have the dust bag and also the sophisticated box embedded with Louboutin's logo. They are also comfortable because the originals. These shoes are replicas but supply the design and prestige.

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Answer 2

(a-b)^n=Cn0*a^n*b^0+Cn1*a^(n-1)*b^1+.......Cn(n-1)*a^1*b^(n-1)+Cnn*a^0*b^n

追问

解释一下，如：Cn啥意思？ ……

追答

二项式定理学了吗？排列组合呢？

Answer 3

直接利用二项式定理可以写出展开式