원리1A-해답3수.PDF 2018-08-13 오후 7:59:47 - 4 - ( ) 7 7 1 6 1 1 5 1 5 7 7 2 5 2 1 4 1 4 7 7 3 4 3 1 3 1 3 7 7 3 4 3 2 2 2 2