17/11/28 22:14:25.16 Ou0gVL8C.net
>>182 訂正
Σ[a=1,27]Σ[b=a+1,28]Σ[c=b+1,29]Σ[d=c+1,30]Σ[e=d+1,31](a+b+c+d+e)=80*C[31,5]
17/11/28 22:14:25.16 Ou0gVL8C.net
>>182 訂正
Σ[a=1,27]Σ[b=a+1,28]Σ[c=b+1,29]Σ[d=c+1,30]Σ[e=d+1,31](a+b+c+d+e)=80*C[31,5]
17/11/28 22:14:25.16 Ou0gVL8C.net
>>182 訂正
Σ[a=1,27]Σ[b=a+1,28]Σ[c=b+1,29]Σ[d=c+1,30]Σ[e=d+1,31](a+b+c+d+e)=80*C[31,5]