Question

Giúp ạ

Answer 1

A=\(\dfrac{2017}{2018}\times\dfrac{7}{8}+\dfrac{2017}{2018}\times\dfrac{3}{8}-\dfrac{2017}{2018}\times\dfrac{1}{4}\)

A=\(\dfrac{2017}{2018}\times\left(\dfrac{7}{8}+\dfrac{3}{8}-\dfrac{1}{4}\right)\)

A=\(\dfrac{2017}{2018}\times1\)

A=\(\dfrac{2017}{2018}\)

Answer 2

`A = 2017/2018 xx 7/8 + 2017/2018 xx 3/8 - 2017/2018 xx 1/4`

`A = 2017/2018 xx ( 7/8 + 3/8 - 1/4 )`

`A = 2017/2018 xx ( 7/8 + 3/8 - 2/8 )`

`A = 2017/2018 xx ( 10/8 - 2/8 )`

`A = 2017/2018 xx 8/8`

`A = 2017/2018 xx 1`

`A = 2017/2018`

`#C_n`