( 1 – 1/4 ) nhân ( 1 – 1/9 ) nhân ( 1 – 1/16 ) nhân ( 1 – 1/25 ) nhân ( 1 – 1/36 ) 19/09/2021 Bởi Reagan ( 1 – 1/4 ) nhân ( 1 – 1/9 ) nhân ( 1 – 1/16 ) nhân ( 1 – 1/25 ) nhân ( 1 – 1/36 )
`(1-1/4)(1-1/9)(1-1/16)(1-1/25)(1-1/36)` `= 3/4 . 8/9 . 15/16 . 24/25 .35/36` `= 1.3/2.2 . 2.4/3.3 . 3.5/4.4 . 4.6/5.5 . 5.7/6.6` `= (1.2.3.4.5)/(2.3.4.5.6) . (3.4.5.6.7)/(2.3.4.5.6)` `= 1/6 .7/2` `=7/12` Bình luận
Đáp án (1- 1/4)* ( 1- 1/9)* ( 1-1/16)* ( 1- 1/25) * ( 1- 1/36) =3/4 * 8/9 * 15/16 * 24/25 * 35/36 = 7/12 Bình luận
`(1-1/4)(1-1/9)(1-1/16)(1-1/25)(1-1/36)`
`= 3/4 . 8/9 . 15/16 . 24/25 .35/36`
`= 1.3/2.2 . 2.4/3.3 . 3.5/4.4 . 4.6/5.5 . 5.7/6.6`
`= (1.2.3.4.5)/(2.3.4.5.6) . (3.4.5.6.7)/(2.3.4.5.6)`
`= 1/6 .7/2`
`=7/12`
Đáp án
(1- 1/4)* ( 1- 1/9)* ( 1-1/16)* ( 1- 1/25) * ( 1- 1/36)
=3/4 * 8/9 * 15/16 * 24/25 * 35/36
= 7/12