4+3=7
5+4.5=9.5
6+6=12
7+(7.5)=14.5
2項(xiàng)的和是個(gè)等差數(shù)列d=2.5
數(shù)字推理:4,3,5,4.5,6,6,7,
數(shù)字推理:4,3,5,4.5,6,6,7,
數(shù)學(xué)人氣:475 ℃時(shí)間:2020-06-05 12:35:44
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