Toán Tính M=1/3.7 + 1/7.11 + 1/11.15 + 1/15.19 + 1/19.23 31/08/2021 By Allison Tính M=1/3.7 + 1/7.11 + 1/11.15 + 1/15.19 + 1/19.23
Đáp án: 5/69 Giải thích các bước giải: M=1/4(1/3-1/7+1/7-1/11+1/11-1/15+1/15-1/19+1/1/19-1/23) M= 1/4(1/3-1/23) M= 5/69 Trả lời
`M= 1/3.7 + 1/7.11 + 1/11.15+1/15.19+ 1/19.23` `4M = 4( 1/3.7+ 1/7.11 + 1/11.15+ 1/15.19+1/19.23)` `4M = 4/3.7 + 4/7.11 + 4/11.15 +4/15.19+4/19.23` `4M = 1/3 – 1/7 + 1/7- 1/11 + 1/11 -1/15+1/15 – 1/19+1/19-1/23` `4M = 1/3 – 1/23` `4M =20/69` `M= 20/69 : 4` `M= 20/69 . 1/4` `M= 5/69` Vậy `M= 5/69` Trả lời
Đáp án:
5/69
Giải thích các bước giải:
M=1/4(1/3-1/7+1/7-1/11+1/11-1/15+1/15-1/19+1/1/19-1/23)
M= 1/4(1/3-1/23)
M= 5/69
`M= 1/3.7 + 1/7.11 + 1/11.15+1/15.19+ 1/19.23`
`4M = 4( 1/3.7+ 1/7.11 + 1/11.15+ 1/15.19+1/19.23)`
`4M = 4/3.7 + 4/7.11 + 4/11.15 +4/15.19+4/19.23`
`4M = 1/3 – 1/7 + 1/7- 1/11 + 1/11 -1/15+1/15 – 1/19+1/19-1/23`
`4M = 1/3 – 1/23`
`4M =20/69`
`M= 20/69 : 4`
`M= 20/69 . 1/4`
`M= 5/69`
Vậy `M= 5/69`