找出(1,3,5)(2,6,10)(3,9,15)(4,12,20).的排列规律
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找出(1,3,5)(2,6,10)(3,9,15)(4,12,20).的排列规律
找出(1,3,5)(2,6,10)(3,9,15)(4,12,20).的排列规律
找出(1,3,5)(2,6,10)(3,9,15)(4,12,20).的排列规律
1,2,3,4 ,5.
3,6,9,12,15.
5,10,15,20.
规律:
(n,(3n),5n) nEN
(A,B,C)
A=n
B=2n+1
C=5n
n=1,2,3......