(1+1/2)×(1+1/4)×(1+1/6)×…×(1+1/10)×(1-1/3)×(1-1/5)×…×(1-1/9)
问题描述:
(1+
)×(1+1 2
)×(1+1 4
)×…×(1+1 6
)×(1-1 10
)×(1-1 3
)×…×(1-1 5
) 1 9
答
(1+12)×(1+14)×(1+16)×…×(1+110)×(1-13)×(1-15)×…×(1-19)=(32×54×76×…×1110)×(23×45×…×89)=(32×23)×(54×45)×(76×76)×…×(1110×1011)×(65×56)×…×(89...