\(\Leftrightarrow\frac{x-1}{117}+1+\frac{x-2}{118}+1+\frac{x-3}{119}=\frac{x-4}{120}+1+\frac{x-5}{121}+1+\frac{x-6}{122}+1\)

\(\Leftrightarrow\frac{x+116}{117}+\frac{x+116}{118}+\frac{x+116}{119}-\frac{x+116}{120}-\frac{x+116}{121}-\frac{x+116}{122}=0\)

\(\Leftrightarrow\left(x+116\right)\left(\frac{1}{117}+\frac{1}{118}+\frac{1}{119}-\frac{1}{120}-\frac{1}{121}-\frac{1}{122}\right)=0\)

\(\Leftrightarrow x+116=0\Leftrightarrow x=-116\)

\(\frac{x-1}{117}+\frac{x-2}{118}+\frac{x-3}{119}=\frac{x-4}{120}+\frac{x-5}{121}+\frac{x-6}{122}\)

\(\Leftrightarrow\frac{x-1}{117}+1+\frac{x-2}{118}+1+\frac{x-3}{119}+1=\frac{x-4}{120}+1+\frac{x-5}{121}+1+\frac{x-6}{122}+1\)

\(\Leftrightarrow\frac{x+116}{117}+\frac{x+116}{118}+\frac{x+116}{119}-\frac{x+116}{120}-\frac{x+116}{121}-\frac{x+116}{122}=0\)

\(\Leftrightarrow\left(x+116\right)\left(\frac{1}{117}+\frac{1}{118}+\frac{1}{119}-\frac{1}{120}-\frac{1}{121}-\frac{1}{122}\right)=0\)

Vì \(\frac{1}{117}+\frac{1}{118}+\frac{1}{119}-\frac{1}{120}-\frac{1}{121}-\frac{1}{122}\ne0\)

Nên x + 116 = 0

<=> x = -116

3A=1.2.3 + 2.3.3 + 3.4.3 +... + n.(n+1).3

=1.2.(3-0) + 2.3.(4-1) + ... + n.(n+1).[(n+2)-(n-1)]

=[1.2.3+ 2.3.4 + ...+ (n-1).n.(n+1)+ n.(n+1)(n+2)] - [0.1.2+ 1.2.3 +...+(n-1).n.(n+1)] 

=n.(n+1).(n+2) 

=>S=[n.(n+1).(n+2)] /3

\(A=1.2+2.2+3.4+...+n\left(n+1\right)\)

\(3A=\left(1.2.3\right)+\left(2.2.3\right)+\left(3.4.3\right)+...+3n\left(n+1\right)\)

\(3A=\left[1.2.\left(3-0\right)\right]+\left[2.3.\left(4-1\right)\right]+\left[3.4.\left(5-2\right)\right]...+n\left(n+1\right)\left[\left(n+2\right)-\left(n-1\right)\right]\)

( phân tích, bạn tự làm ạ, đoạn này dài quá)

\(A=\frac{n.\left(n+2\right).\left(n+1\right)}{3}\)

1 + 1 = 2 , có khi nào bố tk chúng con ko ? 

You were the shadow to my light
Did you feel us
Another start
You fade away
Afraid our aim is out of sight
Wanna see us
Alive

Where are you now
Where are you now
Where are you now
Was it all in my fantasy
Where are you now
Were you only imaginary
Where are you now

Atlantis
Under the sea
Under the sea
Where are you now
Another dream
The monsters running wild inside of me

I'm faded
I'm faded
So lost
I'm faded
I'm faded
So lost
I'm faded

These shallow waters, never met
What I needed
I'm letting go
A deeper dive
Eternal silence of the sea
I'm breathing
Alive

Where are you now
Where are you now

Under the bright
But faded lights
You set my heart on fire
Where are you now
Where are you now

Where are you now
Atlantis
Under the sea
Under the sea
Where are you now
Another dream
The monsters running wild inside of me
I'm faded
I'm faded
So lost
I'm faded
I'm faded
So lost
I'm faded

trả lời:

=2

lên mạng mà tìm

hok tốt

\(x+y=2\)

\(\Rightarrow x=2-y\)

P= \(x^3+x^2y-2x^2-xy-y^2+3y+x+2017\)

  = \(x^3-x^2\left(2-y\right)-y\left(x+y\right)+\left(x+y\right)+2y+2017\)

  = \(x^3-x^2.x-2y+2+2y+2017\)

  = \(2019\)

Chúc bạn học tốt! ^^

You can be my guided light 
Keep me, company in the night 
That's all I need, all I want 
Is for you to stay a little longer now 
With arms around me, a border 
the air I breathe, I let you in 
Keep me warm underneath my skin 
Cause I'm 
Giving in to your touch 
I will never get enough 
Diving deep into the ocean 
Ocean 
Ocean 
Ocean 

You can be my safety zone 
Somewhere I can go when I feel alone 
That's all I need, all I want 
Is to stay a little longer now 
Arms around me a border 
and endless stream 
You take me in 
To a place that I've never been 
Now I'm 

Giving in to your touch 
I will never get enough 
Diving deep into the ocean 
Ocean 
Ocean 
Ocean 

trên mạng

1+2 bằng 3

 You can be my guiding light

Anh có thể trở thành ánh sáng đưa lối em đi
Keep me, company in the night
Chở che, bầu bạn cùng em giữa đêm khuya lạnh
That's all I need, all I want
Đó là tất cả những gì em cần, tất cả những gì em khát khao
Is for you to stay a little longer now
Là anh hãy ở lại bên theo thêm chút nữa đi
With arms around me, a border
Cùng vòng tay ấm ấp ôm em, bảo bọc em
the air I breathe, I let you in
Tựa hồ bầu khí quyển kia, em mở lòng đón nhận
Keep me warm underneath my skin
Để em được ấm áp
Cause i'm
Bởi em…

Giving in to your touch
Đang được anh vuốt ve
I can never get enough
Với em sẽ chẳng bao giờ là đủ
Diving deep into the ocean
Tận sâu dưới đáy đại dương kia
Ocean(x3)
Thăm thẳm tình yêu của anh

You can be my safety zone
Anh có thể trở thành bến bờ bình yên
Somewhere I can go when I feel alone
Đưa em tới bất kỳ nơi đâu khi em cảm thấy cô đơn
That's all I need, all I want
Đó là tất cả những gì em cần, tất cả những gì em ao ước
Is to stay a little longer now
Là anh hãy ở lại bên em lâu hơn chút nữa
Arms around me a border
Đôi vòng tay ấm áp kia, bảo bọc lấy em
and endless stream
Tựa hồ dòng suối xa bất tận
You take me in
Anh đưa em đến
To a place that I've never been
Tới nơi mà em chưa bao giờ được đặt chân
Now i'm
Em, giờ đây

Giving in to your touch
Đang chìm trong sự vuốt ve chiều chuộng
I will never get enough
Với em chẳng bao giờ là đủ
Diving deep into the ocean
Thẳm sâu dưới đáy đại dương của tình yêu
Ocean(x3)
Mênh mông kia

-----

1 + 2 = 3

What's the trick? I wish I knew
I'm so done with thinking through all the things I could've been
And I know you want me, too
All it takes is that one look at you and I run right back to you
You cross that line and it's time to say F you
What's the point in saying that when you know how I'll react?
You think you can just take it back, but shit just don't work that
You're the drug that I'm addicted to, and I want you so bad
Guess I'm stuck with you, and that's that
'Cause when it all falls down, then whatever
When it don't work out for the better
If it just ain't right, and it's time to say goodbye
When it all falls down, when it all falls down
I'll be fine
I'll be fine
You're the drug that I'm addicted to
And I want you so bad, but I'll be fine
Why we fight? I don't know
We say what hurts the most
Oh, I tried staying cold, but you take it personal
All these firing shots and making ground
It's way too hard to cope, but I still can't let you go
'Cause when it all falls down, then whatever
When it don't work out for the better
If it just ain't right, and it's time to say goodbye
When it all falls down, when it all falls down
I'll be fine
I'll be fine
You're the drug that I'm addicted to and I want you so bad
But I'll be fine
I'll be fine, fine, fine
Fine, fine, fine, fine, fine
I'll be fine, fine, fine
Fine, fine, fine, fine, fine
I'll be fine, fine, fine
Fine, fine, fine, fine, fine
I'll be fine, fine, fine
Fine, fine, fine, fine, fine
'Cause when it all falls down, then whatever (Then whatever, babe)
When it don't work out for the better (For the better)
If it just ain't right, and it's time to say goodbye
When it all falls down (When it all, when it all)
When it all falls down (When it all falls down)
I'll be fine
(Fine, fine, fine) I'll be fine (I'll be fine)
You're the drug that I'm addicted to and I want you so bad
But I'll be fine (I'll be fine), and that's that

ALL FALLS DOWN 

What's the trick? I wish I knew
I'm so done with thinking through all the things I could've been
And I know you want me, too
All it takes is that one look at you and I run right back to you
You cross that line and it's time to say F you

What's the point in saying that when you know how I'll react?
You think you can just take it back, but shit just don't work that
You're the drug that I'm addicted to, and I want you so bad
Guess I'm stuck with you, and that's that

'Cause when it all falls down, then whatever
When it don't work out for the better
If it just ain't right, and it's time to say goodbye
When it all falls down, when it all falls down
I'll be fine
I'll be fine
You're the drug that I'm addicted to
And I want you so bad, but I'll be fine

Why we fight? I don't know
We say what hurts the most
Oh, I tried staying cold, but you take it personal
All these firing shots and making ground
It's way too hard to cope, but I still can't let you go

'Cause when it all falls down, then whatever
When it don't work out for the better
If it just ain't right, and it's time to say goodbye
When it all falls down, when it all falls down
I'll be fine
I'll be fine
You're the drug that I'm addicted to and I want you so bad
But I'll be fine

I'll be fine, fine, fine
Fine, fine, fine, fine, fine
I'll be fine, fine, fine
Fine, fine, fine, fine, fine
I'll be fine, fine, fine
Fine, fine, fine, fine, fine
I'll be fine, fine, fine
Fine, fine, fine, fine, fine

'Cause when it all falls down, then whatever (Then whatever, babe)
When it don't work out for the better (For the better)
If it just ain't right, and it's time to say goodbye
When it all falls down (When it all, when it all)
When it all falls down (When it all falls down)
I'll be fine
(Fine, fine, fine) I'll be fine (I'll be fine)
You're the drug that I'm addicted to and I want you so bad
But I'll be fine (I'll be fine), and that's that

\(A=|x+1|+5\ge5\forall x\)

=> Min A = 5 tại \(|x+1|=0\Rightarrow x=-1\)

\(B=\frac{x^2+15}{x^2+3}=1+\frac{12}{x^2+3}\)

Ta có: \(x^2+3\ge3\forall x\)

Min x² + 3 = 3 tại x = 0

Khi đó: Max B = 1+ 12/3 = 5 tại x = 0

=.= hk tốt!!

|x+1 lớn hơn hoặc bằng 0 

=> |x+1|+5 lớn hơn hoặc bằng 5

Dấu = xảy ra khi x+1=0 <=> x=-1

Vậy Min A = 5 khi x=-1 

một cộng một bằng hai hai thêm hai là bốn bốn với một là năm năm ngón ty sạch đều

1 + 1 = 2 nhé , bài đó tui chưa nghe

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