Problem Solving
试题详情
题目：
For a nonnegative integer n, if the remainder is 1 when 2n is divided by 3, then which of the following must be true?
I. n is greater than zero.
II. 3n = (-3)n
III. √2n is an integer.
选项:
A、I only
B、II only
C、I and II
D、I and III
E、II and III
答案:
E
