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1,10,31,70,133(A136B186C226D2560,1,3,8,22,63(A163B174C185D1961,4,3,5,2,6,4,7,(A1B2C3D4

题目详情
1,10,31,70,133( A136 B186 C226 D2560,1,3,8,22,63 ( A163 B174 C185 D1961,4,3,5,2,6,4,7,( A1 B2 C3 D4
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答案和解析
1,10,31,70,133( 后项减去前项9,21,39,63,..后项减前项12,18,24,..等差数列()=24+6+63+133=2260,1,3,8,22,63 ( 3=1*3-08=3*3-122=8*3-263=22*3-3()=63*3-4=1851,4,3,5,2,6,4,7,( 4-3=15-3=26-2=4()=7-4=3"