按规律填数字:①1,3,4,1,9,)②0,9,26,65,124,)③0,4,16,40,80(?)④0,2,10,30(?)

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按规律填数字:①1,3,4,1,9,)②0,9,26,65,124,)③0,4,16,40,80(?)④0,2,10,30(?)
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按规律填数字:①1,3,4,1,9,)②0,9,26,65,124,)③0,4,16,40,80(?)④0,2,10,30(?)
按规律填数字:①1,3,4,1,9,)②0,9,26,65,124,)③0,4,16,40,80(?)④0,2,10,30(?)

按规律填数字:①1,3,4,1,9,)②0,9,26,65,124,)③0,4,16,40,80(?)④0,2,10,30(?)
①1,3,4,1,9,(64)
从第3个数字起,4=(3-1)^2 1=(4-3)^2 9=(1-4)^2
所以X=(9-1)^2=64
0,9,26,65,124,(217)
0(1x1x1-1) 9(2x2x2+1) 26(3x3x3-1) 65(4x4x4+1) 124(5x5x5-1) 217(6x6x6+1)
0,4,16,40,80,140
4-0=4=4*1
16-4=12=4*3=4*(1+2)
40-16=24=4*6=4*(1+2+3)
80-40=40=4*10=4*(1+2+3+4)
140-80=60=4*15=4*(1+2+3+4+5)
0,2,10,30,68
0=0^3+0
2=1^3+1
10=2^3+2
30=3^3+3
4^3+4=68
答案是68