[請問] 有沒有表達1*3*5*7*…的簡約形式?已回收
2!=2*1
3!=3*2*1
4!=4*3*2*1
5!=5*4*3*2*1
.
.
.
那如果是連續的奇數或偶數相乘
比如1*3*5*7*9*……
或者2*4*6*8*10*……
有沒有簡約的符號記錄法
那如果公差不是2時 而是任意數時的記法呢?
比如公差=3的: 1*4*7*9*……
數學上有無記錄此種連乘計算的符號?
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