> 数学 >
计算:(1+
1
1×3
)×(1+
1
2×4
)×(1+
1
3×5
)×…×(1+
1
2007×2009
).
人气:151 ℃ 时间:2020-09-09 05:04:29
解答
(1+11×3)×(1+12×4)×(1+13×5)×…×(1+12007×2009)=1×3+11×3×2×4+12×4×3×5+13×5×…×2007×2009+12007×2009=22×32×42×…×200821×2×32×42×…×20072×2008×2009=2×20082009=4016200...
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