Question

thực hiện phép tính sau 1 cách hợp lý: 1.2.3...9-1.2.3...8-1.2.3...7.8 mũ 2

 

Answer 1

                Bài làm

   1.2.3...9 - 1.2.3...8 - 1.2.3...7.8²

= 1.2.3...8.( 9 - 1 - 8 )

= 1.2.3...8 .0

= 0

_Chúc_Bạn_Hok_Tốt_^^

Answer 2

\(1.2.3....9-1.2.3...8-1.2.3...7.8^2=1.2.3....8\left(9-1-8\right)=1.2.3....8.0=0\)

Answer 3

Giải

Ta có: 1.2.3....9 - 1.2.3....8 - 1.2.3....8^2

= 1.2.3....8(9-1-8)

= 1.2.3....8.0

= 0

Answer 4

\(1.2.3...9-1.2.3...8-1.2.3...8^2\)

\(=1.2.3...8\left(9-8-1\right)\)

\(=1.2.3...8.0=0\)

Answer 5

1.2.3...9 - 1.2.3...8 - 1.2.3...8²

= 1.2.3...8 ( 9 - 8 - 1 )

= 1.2.3....8 . 0

= 0

Study well ! >_<

Answer 6

\(1.2...9-1.2.3.8-1.2...8^2\)

\(=\)\(1.2.3...8.\left(9-1-8\right)\)

\(=\)\(1.2.3...8.0\)

\(=\)\(0\)

Answer 7

1.2.3....9-1.2.3....8-1.2.3...7.8²=1.2.3....8.9-1.2.3.....8.1-1.2.3.....8.8=1.2.3....8.[9-1-8]=1.2.3....8.0=0

Answer 8

1.2.3...9 - 1.2.3...8 - 1.2.3...7.82

 

= 1.2.3...8.( 9 - 1 - 8 )

 

= 1.2.3...8 .0

 

= 0