BNX(bnx币最新消息)
D区品类及品牌 少女服饰YOUNG’S FASHIONARTISBNXCELANOCHRISS DELLA MODACUSHOWDIAMOND DAZZLEEV...
D区品类及品牌 少女服饰YOUNG’S FASHIONARTISBNXCELANOCHRISS DELLA MODACUSHOWDIAMOND DAZZLEEV...
1、解由韦达定理得 an +an+1=bn an×an+1=2^n a1×a2=1×a2=a2=2 an+2×an+1=2^n+1an+2×an+1an×an+...