规定(3)=2X3X4,(4)=3X4X5,(5)=4X5X6,.如果1/(6)+1/(7)=1/(7)X·,那么· 等于多少

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规定(3)=2X3X4,(4)=3X4X5,(5)=4X5X6,.如果1/(6)+1/(7)=1/(7)X·,那么·等于多少规定(3)=2X3X4,(4)=3X4X5,(5)=4X5X6,.如果1/(

规定(3)=2X3X4,(4)=3X4X5,(5)=4X5X6,.如果1/(6)+1/(7)=1/(7)X·,那么· 等于多少
规定(3)=2X3X4,(4)=3X4X5,(5)=4X5X6,.如果1/(6)+1/(7)=1/(7)X·,那么· 等于多少

规定(3)=2X3X4,(4)=3X4X5,(5)=4X5X6,.如果1/(6)+1/(7)=1/(7)X·,那么· 等于多少
按题设的规律,(6)=5*6*7,(7)=6*7*8,
由等式知·=(7)/(6)+1=(6*7*8)/(5*6*7)+1=13/5