X=15x20x25x30x35...............x100
(x=乘)
請找出Xㄉ所有質因數
拜託~!
快~!
2005-09-07 17:37:11 · 2 個解答 · 發問者 Anonymous in 教育與參考 ➔ 其他:教育
15=5*3,20=5*4,25=5*5.......100=5*20;
每個都有五的質因數...
換句話說X=(5^18)*3*4*5*6*...*20
這樣一來質數就比較好找了
答案:2.3.5.7.11.13.17.19
2005-09-08 09:53:18 · answer #1 · answered by Anonymous · 0⤊ 0⤋
答案如下:2,3,5,7,11,13,17,19
2005-09-07 17:46:42 · answer #2 · answered by Frank 7 · 0⤊ 0⤋