熱心網(wǎng)友
12
熱心網(wǎng)友
兩項(xiàng)兩項(xiàng)地看，前項(xiàng)除以后項(xiàng)的商分別是3,1/3,7,1/7,6,(1/6)互為倒數(shù),答案12
熱心網(wǎng)友
12
熱心網(wǎng)友
12
熱心網(wǎng)友
12
熱心網(wǎng)友
A 12
熱心網(wǎng)友
12
熱心網(wǎng)友
12
熱心網(wǎng)友
A12
熱心網(wǎng)友
A15,5,3,9, 14,2,7,49, 18,3,2,() 四項(xiàng)一組前兩項(xiàng)的商與第三項(xiàng)的積等于第四項(xiàng)15/5*3=914/2*7=4918/3*2=12