Tổng của hai số là : 276 : 2 = 138
Vì chúng là hai số chẵn nên khoảng cách của chúng là 2
Số hạng thứ 1 là : [138 + 2] : 2 = 70
Số hạng thứ 2 là : 138 - 70 = 68
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