Mathematics
SMA

想問這題n/3是怎麼求出來的~~

In值: n-1 (2) C3=C₂-¹, (3
n! (n-1)! (2) 3 ! (n − 3 ) ! 2! (n-3)! n ⇒ 3 =1⇒n=3.06 →>>

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