A1(1,1) A2(2,-4) A3(3,4) A4(4,-2) A5(5,7) A6(6,-3/4)A7(7,10)
2个回答
横坐标一次加1从1开始一直到8.
纵坐标中正整数有1,4,7,10依次加3.
负数有-4,-2,-3,-1 -4和-2间相差2,-3和-1间也一样
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