1/3+-1/4+1/5+-1/6+1/7+1/6+1/-5+1/4+1/-3

Đáp án:

`↓`

Giải thích các bước giải:

`1/3 + ( -1 )/4 + 1/5 + ( -1 )/6 + 1/7 + 1/6 + 1/( -5 ) + 1/4 + 1/( -3 )`
`= ( 1/3 + 1/-3 ) + ( ( -1 )/4 + 1/4 ) + ( 1/5 + 1/( -5 )) + ( ( -1 )/6 + 1/6 ) + 1/7`

`= 0 + 0 + 0 + 0 + 1/7`

`= 1/7`

$\text{#lknhatminh0322}$

`1/3 + {-1}/4 + 1/5 + {-1}/6 + 1/7 + 1/6 + 1/{-5} + 1/4 + 1/{-3}`

`= 1/3 - 1/4 + 1/5 - 1/6 + 1/7 + 1/6 - 1/5 + 1/4 - 1/3`

`= ( 1/3 - 1/3 ) + ( -1/4 + 1/4 ) + ( 1/5 - 1/5 ) + ( -1/6 + 1/6 ) + 1/7`

`= 0 + 0 + 0 + 0 + 1/7`

`= 1/7`