If n is a positive integer, what is the remainder when 38n+3 + 2 is divided by 5?
A. 0
B. 1
C. 2
D.
E. 4
thanks
3的1次方到4次方的尾数分别是3,9,7,1, 然后又循环重复,所以38n+3 的尾数是7,再加2,即9,答案呼之欲出.
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