Vì \(\left|x-61\right|\ge0\forall x\)

\(\Rightarrow\left|x-61\right|+207\ge207\forall x\)

Dấu "=" xảy ra khi và chỉ khi x - 61 = 0 => x = 61

Vậy MIN M = 207 khi và chỉ khi x = 61

ta có : 45= 9.5

de 90xy chia het cho 5 => y= 0;5

+nếu y =0 

 de 90x0 chia hết cho 9 <=>9+0+x+0 chia het cho 9 

                                => x chia hết cho 9

ma x là số có 1cs => x=9;0

+neu y=5 

 de 90x5 chia hết cho 9 <=> 9+0+x+5 chia het cho 9 

                                   => 5+x chia het cho 9 

mà x là số có 1cs => x=4

Có 2 cách sửa lỗi:

She has her breakfast at home.

Does she have her breakfast at home?

Mai (1) is my younger sister. She (2) studies at Ngo Quyen School and in class 7A. She (3) goes to school from Monday to Saturday and she doesn't go to school (4) on Sunday. Her classes (5) begins at 7.00 and finish at 11.15. She is very interested (6) in Computers and Computer science is her (7) favorite subject. She often skips (8) at recess and plays badminton after school. Mai likes reading and doing the housework (9) in her free time so she knows many things and is very good (10) at cooking.

70

tick cho mk nha vu uy phong