Toán (1-1/2)x(1-1/3)x(1-1/4)x(1-1/5)x(1-1/6)x(1-1/7)x(1-1/8)x(1-1/9) 04/12/2021 By Alexandra (1-1/2)x(1-1/3)x(1-1/4)x(1-1/5)x(1-1/6)x(1-1/7)x(1-1/8)x(1-1/9)
`(1-1/2)×(1-1/3)×(1-1/4)×(1-1/5)×(1-1/6)×(1-1/7)×(1-1/8)×(1-1/9)` `=(2/2-1/2)×(3/3-1/3)×(4/4-1/4)×(5/5-1/5)×(6/6-1/6)×(7/7-1/7)×(8/8-1/8)×(9/9-1/9)` `=1/2×2/3×3/4×4/5×5/6×6/7×7/8×8/9` `=(1×2×3×4×5×6×7×8)/(2×3×4×5×6×7×8×9)` `=1/9` Trả lời
`\text{~~Holi~~}` `(1-1/2)(1-1/3)(1-1/4)(1-1/5)(1-1/6)(1-1/7)(1-1/8)(1-1/9)` `= 1/2 . 2/3 . 3/4 . 4/5 . 5/6 . 6/7 . 7/8 . 8/9` `=1/9` Trả lời
`(1-1/2)×(1-1/3)×(1-1/4)×(1-1/5)×(1-1/6)×(1-1/7)×(1-1/8)×(1-1/9)`
`=(2/2-1/2)×(3/3-1/3)×(4/4-1/4)×(5/5-1/5)×(6/6-1/6)×(7/7-1/7)×(8/8-1/8)×(9/9-1/9)`
`=1/2×2/3×3/4×4/5×5/6×6/7×7/8×8/9`
`=(1×2×3×4×5×6×7×8)/(2×3×4×5×6×7×8×9)`
`=1/9`
`\text{~~Holi~~}`
`(1-1/2)(1-1/3)(1-1/4)(1-1/5)(1-1/6)(1-1/7)(1-1/8)(1-1/9)`
`= 1/2 . 2/3 . 3/4 . 4/5 . 5/6 . 6/7 . 7/8 . 8/9`
`=1/9`