[機統] ΣC(100,r)^2 (清大統研機率考題)
103清大統研機率考題:
100
Σ C(100,r)^2
r=0
此級數該如何求解?
其中C(100,r)代表100取r的組合數,
C(m,n)=m!/n!(m-n)!
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※ 編輯: anovachen 來自: 111.255.13.218 (02/15 23:21)