[機經] 分類版數學11
11. DS: x有多少個小於它的factor?
1)x^2有exactly 4個小於x^2的factor
2)2x有exactly 3個小於2x的factor
另一個版本答案是D
1)迳 x2共有5個因數迳 x2=a4(a為任意質數)迳x=a2迳充分;
2)迳 2x共有4個因數迳x= b (b為不等於2的任意質數) 迳充分;
選D
分類版本答案是A
1我知道可以成立
想請問2勒
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