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30 tháng 10 2021

Tổng của 2 số: 3256 x 2 = 6512

Số bé: (6512 - 524) : 2 = 1366 

Số lớn: 6512 - 1366 = 5146

chúc bn học tốt :)

Giải

Số bé là :

( 3256 - 524 ) : 2 = 1 366

Số lớn là :

 1 366  + 524 = 1 890

                      Đáp số :số bé 1 366

                                   số lớn 1 890

~HT~

Bài 1: 

a: \(\sqrt{0.49a^2}=-0.7a\)

b: \(\sqrt{25\left(a-7\right)^2}=5a-35\)

c: \(\sqrt{a^4\left(a-2\right)^2}=a^2\cdot\left(a-2\right)\)

d: \(\dfrac{1}{a-3b}\cdot\sqrt{a^6\left(a-3b\right)^2}\)

\(=\dfrac{1}{a-3b}\cdot a^3\cdot\left(a-3b\right)=a^3\)

Bài 2: 

a: \(2\left(x+y\right)\cdot\sqrt{\dfrac{1}{x^2+2xy+y^2}}\)

\(=2\left(x+y\right)\cdot\dfrac{1}{x+y}\)

=2

b: \(\dfrac{3x}{7y}\cdot\sqrt{\dfrac{49y^2}{9x^2}}\)

\(=\dfrac{3x}{7y}\cdot\dfrac{-7y}{3x}\)

=-1

2 tháng 9 2021

hình bé quá

2 tháng 9 2021

sin 650=cos 350
\(cos70^0=sin30^0\)
\(tan80^0=cot20^0\)
\(cot68^0=tan32^0\)

a.

- Thử với lượng nhỏ mỗi chất.

 dd HCldd H2SO4
dd BaCl2Không hiện tượngKết tủa trắng

\(H_2SO_4+BaCl_2\rightarrow BaSO_4\downarrow\left(trắng\right)+2HCl\)

b. 

- Thử với lượng nhỏ mỗi chất.

 dd KCldd K2SO4
dd BaCl2Không hiện tượngKết tủa trắng
 

\(K_2SO_4+BaCl_2\rightarrow BaSO_4\downarrow\left(trắng\right)+2KCl\)

c.

a.

- Thử với lượng nhỏ mỗi chất.

 dd K2SO4dd H2SO4
Qùy tímKhông đổi màuHóa đỏ

 

 

 

 

20 tháng 9 2021

Cảm ơn anh nhiều

16 tháng 12 2021

b: Xét tứ giác ABCD có

M là trung điểm của AC

M là trung điểm của BD

Do đó: ABCD là hình bình hành

Suy ra: AB//CD

19 tháng 12 2021

#include <bits/stdc++.h>

using namespace std;

double a;

int main()

{

cin>>a;

if (a>=8.0) cout<<"Gioi";

else if (6.5<=a) cout<<"Kha";

else if (5.0<=a) cout<<"Trung Binh";

else if (3.5<=a) cout<<"Yeu";

else cout<<"Kem";

return 0;

}

14 tháng 9 2021

1 knowing the answer, they told us

2 the unique handicraft, we didn't like it

3 We looked into these machines so that we could find out the method 

We looked into these machines so as to find out the method 

4 Jack's poverty, everyone looks up to him

5 In order to choose the best chair, Linda looked through this catalouge 

6 is not as dirty as this one

7 I didn't play as successfully as Linda

8 A dog can't run as fast as a horse

A dog runs more slowly than a horse

9 No rivers in the world is as long as the Nile

10 No one in my family talks as politely as Linda

14 tháng 9 2021

thank you so much

12 tháng 9 2021

1 was arrested before the garden by the boy yesterday

2 his cats taken care of carefully by Jack everyday

3 Has the country been protected from Covid-19 successfully

4 is reported that the man is running out of money

is reported to be running out of money\

5 has been said that the thief got out of the prison

has been said to have got out of the prison

6 was thought that Mary had turned down the job

Mary was thought to have  turned down the job

12 tháng 9 2021

thanhk you so much

13 tháng 9 2021

\(1,\\ a,=\dfrac{\left(3+2\sqrt{3}\right)\sqrt{3}}{3}+\dfrac{\left(2+\sqrt{2}\right)\left(\sqrt{2}-1\right)}{1}\\ =\dfrac{3\sqrt{3}+6}{3}+\sqrt{2}=\sqrt{3}+1+\sqrt{2}\\ b,=\left(\dfrac{\sqrt{5}+\sqrt{2}}{3}-\dfrac{\sqrt{5}-\sqrt{2}}{3}+1\right)\cdot\dfrac{1}{\left(\sqrt{2}+1\right)^2}\\ =\dfrac{\sqrt{5}+\sqrt{2}-\sqrt{5}+\sqrt{2}+3}{3}\cdot\dfrac{1}{\left(\sqrt{2}+1\right)^2}\\ =\dfrac{2\sqrt{2}+3}{3\left(3+2\sqrt{2}\right)}=\dfrac{1}{3}\)

\(2,\\ A=2x+\sqrt{\left(x-3\right)^2}=2x+\left|x-3\right|\\ =2\left(-5\right)+\left|-5-3\right|=-10+8=-2\\ B=\dfrac{\sqrt{\left(2x+1\right)^2}}{\left(x-4\right)\left(x+4\right)}\left(x-4\right)^2=\dfrac{\left|2x+1\right|\left(x-4\right)}{x+4}\\ B=\dfrac{17\cdot4}{12}=\dfrac{17}{3}\)

có ai bt làm bài này k giúp mk vs mk đang cần rất rất là gấp mong các bn giúp choI. BỊ ĐỘNG với ĐỘNG TỪ TƯỜNG THUẬT (theo 2 cách)1.They  told me that you were the best architect in this city.……………………………………………………………………………………..……………………………………………………………………………………….2.She has reported that the flowers were killed by frost.……………………………………………………………………………………..……………………………………………………………………………………….3.Some people inform me that  the director is going to take a business trip to...
Đọc tiếp

có ai bt làm bài này k giúp mk vs mk đang cần rất rất là gấp mong các bn giúp cho

I. BỊ ĐỘNG với ĐỘNG TỪ TƯỜNG THUẬT (theo 2 cách)

1.They  told me that you were the best architect in this city.

……………………………………………………………………………………..

……………………………………………………………………………………….

2.She has reported that the flowers were killed by frost.

……………………………………………………………………………………..

……………………………………………………………………………………….

3.Some people inform me that  the director is going to take a business trip to England.

……………………………………………………………………………………..

……………………………………………………………………………………….

4.That officer announced that the meeting was delayed until next week.

……………………………………………………………………………………..

……………………………………………………………………………………….

5.He discovered that  this cotton was grown in Egypt.

……………………………………………………………………………………..

……………………………………………………………………………………….

6.They have promised that the performance will start on time.

……………………………………………………………………………………..

……………………………………………………………………………………….

7.He recommends that  we should stay at the city center.

……………………………………………………………………………………..

……………………………………………………………………………………….

8.We believed that Alice would pass the driving test.

……………………………………………………………………………………..

……………………………………………………………………………………….

9.The director notifies all the workers that they will  have to work extra hard  this month.

……………………………………………………………………………………..

……………………………………………………………………………………….

10.They have persuaded me that they will go with me to the stadium.

……………………………………………………………………………………..

……………………………………………………………………………………….

11.They have decided that the company will go to the beach together at the weekend.

……………………………………………………………………………………..

……………………………………………………………………………………….

12.People think that Maradona is the best football player  in the 20th century.

……………………………………………………………………………………..

……………………………………………………………………………………….

13.They find that the job is not suitable for a girl like her.

……………………………………………………………………………………..

……………………………………………………………………………………….

14.The teacher explained that this powerful engine pulled the train.

……………………………………………………………………………………..

……………………………………………………………………………………….

15.He told me that his football team had played well last season.

……………………………………………………………………………………..

……………………………………………………………………………………….

16. People say that the company is losing money.

……………………………………………………………………………………..

……………………………………………………………………………………….

17.  People believe that he worked very hard.

……………………………………………………………………………………..

……………………………………………………………………………………….

18. People say that they work 14 hours a day.

……………………………………………………………………………………..

……………………………………………………………………………………….

19. Someone thinks that Lan will return tomorrow

……………………………………………………………………………………..

……………………………………………………………………………………….

Rewrite these sentences :

1.        They say that she is the best singer in this town.

She                                                                                                                          

2.        They believe he will be the winner.

It                                                                                                                             

3.        People think that Tom stole food in the supermarket 3 days ago.

Tom                                                                                                                        

4.        Someone reported that the situation was under control.

The situation                                                                                                            

5.        It is said that she works 16 hours a day.

She                                                                                                                          

6.        Someone thinks that the company is planning a new advertising campaign.

The company                                                                                                           

7.        Everyone expects that the soap opera will end next year.
It                                                                                                                             

8.        It is alleged that the man drove through the town at 90 miles an hour.
The man                                                                                                                            

9.        Someone believed that the President had suffered a heart attack.
The president                                                                                                           

10.    They think that the prisoners escaped by climbing over the wall.

The prisoners                                                                                                           

11.    It is reported that the buildings have been badly damaged by fire.
The buildings                                                                                                           

12.    It is reported that many people are homeless after the floods.

Many people                                                                                                            

13.    We all expected that Marta will pass the exam.

It                                                                                                                             

14.    We knew that you are in town on the night of the crime.     

You                                                                                                                         

15.    People believe that he was killed by terrorists.
He                                                                                                                           

1
26 tháng 11 2021

mk bt làm nhưng nó dài quá :)))