Is the integer n odd?
(1)n is divisible by 3.
(2)2n is divisible by twice as many positive integer as n.
ANS.B
程度真的不太好
連題目都看不懂XD
請問B是什麼意思??
版主直接補充:=> (2) 2n is divisible by twice as many positive integers as n is divided by many positive integers
講2n的因子是n的因數的兩倍