這兩題 是老二 (8年級 )算出來的:
a b c d e f g
1,1,3,7, 17, 41, 99
規律:
e=2d+c
g=2f+e
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a b c d e f g
1364, 1832, 2316, 2808, 3304, 3802, 4301 ?
b-a = 468
c-b = 484 =468+16 .
d-c= 492=468+24 = 468+16+8
e-d=496=468+28 = 468 +16 +4
f-e=498=468+30 = 468 +16 +2
g-f=499=468+31 = 468 +16 +1