CÁC BẠN GIẢI CHI TIẾT RA NHÉ

Tìm x :

x - 2 = -47 - 4x

x + 4x = -47 + 2

5x = -45

x = -45 : 5

x = -9

Vậy x = -9.

Tìm n thuộc Z :

Ta có : n-4 chia hết cho n+3

=> n+3-7 chia hết cho n+3

=> 7 chia hết cho n+3

=> n+3 thuộc Ư(7) = { -7 ; -1 ; 1 ; 7 }

=> n thuộc { -10 ; -4 ; -2 ; 4 }

Vậy n thuộc { -10 ; -4 ; -2 ; 4 }

thank bạn

tại sao lại là n+3-7 vậy

After a week of hard study, Sunday, dad take you watch football at the My Dinh Stadium.Today Vietnam team met the Thai team. Vietnam team dressed in red, while the Thai team wore blue. Team Vietnam was right before kick off. The referee and referee signaled the game starts. Exciting game from the first minute. First Half our team has notscored any goals.Into the second half, just 10 minutes Cong Vinh pass the Kingdom, he slowly came Thailand defender and scorer scored his first goal for the team in Vietnam. The whole stadium cheers rang loud cheers. The air is very noisy in the field. The match began. Thailand team scored the 1-1 equalizer. But just a few minutes later, Van Quyen team scored a goal to add more. First half really tough, aggressive. But by the end of the game is no more goals are scored. The referee whistle well finish the match. Vietnam team won2-1 This real football game exciting. I hope next time to be announced taken to watch a football game again

a, \(2\sqrt{3}-\sqrt{4+x^2}=0\Leftrightarrow\sqrt{4+x^2}=2\sqrt{3}\)

\(\Leftrightarrow x^2+4=12\Leftrightarrow x^2=8\Leftrightarrow x=\pm2\sqrt{2}\)

b, \(\sqrt{16x+16}-\sqrt{9x+9}=0\)ĐK : x >= -1 

\(\Leftrightarrow4\sqrt{x+1}-3\sqrt{x+1}=0\Leftrightarrow\sqrt{x+1}=0\Leftrightarrow x+1=0\Leftrightarrow x=-1\)

c, \(\sqrt{4\left(x+2\right)^2}=8\Leftrightarrow2\left|x+2\right|=8\Leftrightarrow\left|x+2\right|=4\)

TH1 : \(x+2=4\Leftrightarrow x=2\)

TH2 : \(x+2=-4\Leftrightarrow x=-6\)

c: Ta có: \(\sqrt{4\left(x+2\right)^2}=8\)

\(\Leftrightarrow\left|x+2\right|=4\)

\(\Leftrightarrow\left[{}\begin{matrix}x+2=4\\x+2=-4\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=2\\x=-6\end{matrix}\right.\)

Số tiếp theo là 37

Quy luật là \(x^2+1\)

1; 2; 5; 10; 17; 26; 37

quy luật

\(1^2+1=2;2^2+1=5....\)

số tiếp theo là :

`1 ; 2 ; 5 ; 10 ; 17 ; 26 ; 37 ; .........

quy luật là :

 `x^2 + 1` ví dụ `1^2 + 1 =2` ........