Binomial
 Usage
• Binomial[n, m] 给出了二项系数  .
Notes
• 可能的话Binomial 进行符号求值。 • 例如: Binomial[x+2, x]  . • 通常  由  或合适的限制定义. • 参见 Mathematica 全书: 节 3.2.5.
 Further Examples
In how many ways can you choose  objects from  ?
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Here is a table of the first nine rows of Pascal's triangle.
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Here is an identity.
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