bạn ấy bj hack nick cj ạ

Chào mừng bạn đến với học 24h !!!

người xưng tôi vì nghĩ vậy

What do you do now? => What are you doing now?

I listen to music => I am listening to music

Shuttlecock kicking

1: You have to be careful when crossing the street

2: Before you have the right flower garden?

3: Thank you for the beautiful gift

4: You often wear before breakfast, right?

5: Near the rice fields have many tall trees

6: Who was waiting for her?

7: She is waiting for someone?

8: In the winter, day and night short

9: brown eyes of his sister right?

10: Have some milk into the cup.

mk đã ns là ms thi có vòng 4 nên ko nhớ đỉm mà

113+x chia hết cho 7

=>112+1+x chia hết cho 7

=>1+x chia hết cho 7

=>7-6+x chia hết cho 7

=>x-6 chia hết cho 7

=>x-6=7k

=>x=7k+6

Mình làm tắt bước xét giá trị nha bạn thông cảm

a)x²-2x+3=(x²-2x+1)+2=(x-1)²+2>2

=>Min=2<=>(x-1)²=0<=>x=1

b)2x²-4x=(2x²-4x+2)-2=2(x-1)²-2>-2

=>Min = -2<=>(x-1)²=0<=>x=1

c)\(\sqrt{x^2+4x+5}=\sqrt{x^2+4x+4+1}=\sqrt{\left(x+2\right)^2+1}\ge\sqrt{1}=1\)

=>Min=1<=>(x+2)²=0<=>x=-2