mình nghĩ câu này mà làm thì hơi lâu đấy sợ ko kịp đc đâu bn ạ

Olm chào em, cảm ơn em đã tin tưởng và sử dụng nền tảng olm trong việc học tập, giao lưu. Cảm ơn em đã gửi thắc mắc tới olm. Olm đã check bài luyện đó, nút nộp bài vẫn có ở góc trái phía dưới của bài học em nhá. Em ấn vào đó, sau khi em làm hết bài hệ thống sẽ gửi thông báo tới ba mẹ của em.

Chúc em học tập vui vẻ và hiệu quả olm 

3 CHỤC

em thưa cô hình bên dưới là 3 chục ạ.

Mình tổng kết thứ 5 tuần này rồi !

mk tổng kết thứ 7 nè

 

đúng vậy

mk thứ 3 ngày 24 tháng 5 mới tổng kết 

hồi hộp quá đi thôi!

GẤP Ạ...

mk k thấy đề bài =(((

Bài 1:

c) \(C=\dfrac{5}{\sqrt{7}+\sqrt{2}} - \sqrt{8-2\sqrt{7}} + \sqrt{2} \)

⇔ \(C=\dfrac{5}{\sqrt{7}+\sqrt{2}} - \sqrt{(\sqrt{7})^2 - 2\sqrt{7}+1} + \sqrt{2} \)

⇔ \(C=\dfrac{5}{\sqrt{7}+\sqrt{2}} - \sqrt{(\sqrt{7}-1)^2} + \sqrt{2} \)do 

⇔ \(C=\dfrac{5}{\sqrt{7}+\sqrt{2}} - |\sqrt{7}-1| + \sqrt{2} \)

⇔ \(C=\dfrac{5}{\sqrt{7}+\sqrt{2}} - \sqrt{7}+1 + \sqrt{2} \)   (do \(\sqrt{7} > 1 \))

⇔ \(C=\dfrac{5}{\sqrt{7}+\sqrt{2}} - (\sqrt{7} - \sqrt{2}) +1 \)

⇔ \(C=\dfrac{5-(\sqrt{7} - \sqrt{2})(\sqrt{7}+\sqrt{2})}{\sqrt{7}+\sqrt{2}} +1 \)

⇔ \(C=\dfrac{5-7+2}{\sqrt{7}+\sqrt{2}} +1 =\dfrac{0}{\sqrt{7}+\sqrt{2}} +1 \)

⇔ \(C = 0 + 1 = 1\)

Vậy \(C=1\)

Bài 3: 

c) Ta có: \(M=\dfrac{Q}{P} \)

⇔ \(M=\dfrac{\dfrac{\sqrt{x}}{\sqrt{x}-2}}{\dfrac{\sqrt{x}+5}{\sqrt{x}-2} } \)

⇔ \(M=\dfrac{\sqrt{x}}{\sqrt{x}+5} \)

Mà:  \(M<\dfrac{1}{2} \) ⇔ \(\dfrac{\sqrt{x}}{\sqrt{x}+5} <\dfrac{1}{2} \)

⇒ \(2\sqrt{x} < \sqrt{x}+5 \) (nhân 2 vế với \(2.(\sqrt{x} +5) >0\))

⇔ \(\sqrt{x}<5 \) ⇔ \(x<25\)

Kết hợp điều kiện ban đầu, ta đc:

Vậy khi \(0≤x<25\) và \(x≠4\) thì \(M=\dfrac{Q}{P} < \dfrac{1}{2} \)

 

Bài 3:

d) \(M= \dfrac{\sqrt{x}}{\sqrt{x}+5} \)

⇔ \(M= \dfrac{\sqrt{x}+5-5}{\sqrt{x}+5}=M= 1-\dfrac{5}{\sqrt{x}+5} \)

M đạt giá trị nguyên khi: \(x∈Z \) và \(\dfrac{5}{\sqrt{x}+5} ∈Z \)

\(\dfrac{5}{\sqrt{x}+5} ∈Z \) khi \((\sqrt{x}+5) ∈ Ư_{5}\)

Mà \(\sqrt{x}+5>0\) nên ta có bảng sau: 

\(\sqrt{x}+5\)	1	5
\(x\)	Loại	0 (TM)

Vậy \(x=0\) thì \(M\) nhận giá trị nguyên

 

 

 

 

Bài 5: 

1. There are a few students taking part in the event     

→ There aren't many students taking part in the event.

2. If he doesn't work hard, he will lose his job     

→ Unless he works hard, he will lose his job.

3. Let's write about the three Rs ?         

→ Why  don't we write about the three Rs?

4. Learning about recyking is fun           

→ It's fun to learn about recycling.

5. It's not good to throw old clothes away               

→ You  shouldn't throw old clothes away

Xếp từ thành câu

Bài 1

1. they / to / movies / do / how / go / the / often ?   

→ How often do they go to the movies?

2. your eyes / swimming / should / when  goggles / you / you / go / wear / to protect

→ When you go swimming, you should wear goggles to protect your eyes.

3. usually / his  / swimming / with / friends / he / goes       

→ He usually goes swimming with his friends.

4. go / do / weekend / on / always / fishing / parents / their ?   

→ Do their parents always go fishing on the weekend?

5. camping / they / go / do / sometimes

→  Sometimes they go camping.

6. what / TV / you / do / on / sports / watch?

→ What sports do you watch on TV?

Bài 2

1. Our / important / an / sports and games / in play / lives / part       

→ Sports and games play an important part in our lives.       

2. players / how / match / there / in / many / are / football / a ?   

→ How many players are there in a football match?

3. by / she / to keep / every day / tries / fit / jogging 

→ She tries to keep fit by jogging every day.

4. yesterday / who / play / football / you / did / with ?

→ Who did you play football with yesterday?

5. sports / building / physical and strength / necessary / are / for

→ Sports are necessary for building physical strength.

6. to switch / before / go / don't / the TV / off / you / forget / to bed

→ Don't forget to switch off the TV before you go to bed.

7. Sunday / I / usually / friends / swimming / on / go / mornings / with / my

→ On Sunday mornings, I usually go swimming with my friends.

8. match / you / on / the / did / television / last night / watch / basketball / the ?

→ Did you watch the basketball match on television last night? 

Ding dong
I know you can hear me
Open up the door
I only want to play a little
Ding dong
You can't keep me waiting
It's already too late
For you to try and run away

I see you through the window
Our eyes are locked together
I can sense your horror
Though I'd to see it closer

Ding dong
Here I come to find you
Hurry up and run
Let's play a little game and have fun
Ding dong
Where is it you've gone to?
Do you think you've won?
Our game of hide and seek has just begun

I hear your footsteps
Thumping loudly through the hallways
I can hear your sharp breaths
You're not very good at hiding

Just wait, you can't hide from me
(I'm coming)
Just wait, you can't hide from me
(I'm coming)
Just wait, you can't hide from me
(I'm coming)
Just wait, you can't hide from me

Knock knock
I am at your door now
I am coming in
No need for me to ask permission
Knock knock
I'm inside your room now
Where is it you've hid?
Our game of hide and seek's about to end

I'm coming closer
Looking underneath your bed but
You're not there, I wonder
Could you be inside the closet?

Ding dong
I have found you
Ding dong
You were hiding here
Now you're it

Ding dong
Finally found you, dear
Now you're it
Ding dong
Looks I have won
Now you're it
Ding dong
Pay the consequence

Ding dong
Looks I have won
Now you're it
Ding dong
Pay the consequence

Đây nha 

Ding dong
I know you can hear me
Open up the door
I only want to play a little
Ding dong
You can't keep me waiting
It's already too late
For you to try and run awayI see you through the window
Our eyes are locked together
I can sense your horror
Though I'd like to see it closerDing dong
Here I come to find you
Hurry up and run
Let's play a little game and have fun
Ding dong
Where is it you've gone to?
Do you think you've won?
Our game of hide and seek has just begunI hear your footsteps
Thumping loudly through the hallways
I can hear your sharp breaths
You're not very good at hidingJust wait, you can't hide from me
(I'm coming)
Just wait, you can't hide from me
(I'm coming)
Just wait, you can't hide from me
(I'm coming)
Just wait, you can't hide from meKnock knock
I am at your door now
I am coming in
No need for me to ask permission
Knock knock
I'm inside your room now
Where is it you've hid?
Our game of hide and seek's about to endI'm coming closer
Looking underneath your bed but
You're not there, I wonder
Could you be inside the closet?Ding dong
I have found you
Ding dong
You were hiding here
Now you're itDing dong
Finally found you, dear
Now you're it
Ding dong
Looks like I have won
Now you're it
Ding dong
Pay the consequenceDing dong
Looks like I have won
Now you're it
Ding dong
Pay the consequence   

Ding dong
I know you can hear me
Open up the door
I only want to play a little
Ding dong
You can't keep me waiting
It's already too late
For you to try and run awayI see you through the window
Our eyes are locked together
I can sense your horror
Though I'd like to see it closerDing dong
Here I come to find you
Hurry up and run
Let's play a little game and have fun
Ding dong
Where is it you've gone to?
Do you think you've won?
Our game of hide and seek has just begunI hear your footsteps
Thumping loudly through the hallways
I can hear your sharp breaths
You're not very good at hidingJust wait, you can't hide from me
(I'm coming)
Just wait, you can't hide from me
(I'm coming)
Just wait, you can't hide from me
(I'm coming)
Just wait, you can't hide from meKnock knock
I am at your door now
I am coming in
No need for me to ask permission
Knock knock
I'm inside your room now
Where is it you've hid?
Our game of hide and seek's about to endI'm coming closer
Looking underneath your bed but
You're not there, I wonder
Could you be inside the closet?Ding dong
I have found you
Ding dong
You were hiding here
Now you're itDing dong
Finally found you, dear
Now you're it
Ding dong
Looks like I have won
Now you're it
Ding dong
Pay the consequenceDing dong
Looks like I have won
Now you're it
Ding dong
Pay the consequence   

BÁO CÁO

tìm lỗi chính tả đê

tao hỏi nghiêm túc đấy

Báo cáo ;-;

???? Là gì