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13 tháng 4 2018

1 + 1 = 2 nha !

13 tháng 4 2018

= 2 đấy bn ạ 

20 tháng 4 2016

2 k cho mình thì sẽ kết bạn

20 tháng 4 2016

1+1=2

k nha

27 tháng 3 2022

Đổi: 1h30 phút = 1,5h
Quãng đường AB dài là:
60 . 1,5 = 90 (km)
Nửa quãng đường AB dài là:
90 : 2 = 45 (km)
Vận tốc xe máy là:
60 . 3/5 = 36 (km/h)
Xe máy đi hết nửa quãng đường AB trong:
45 : 36 = 1,25 (giờ)
Đáp số 1,25 giờ

Đổi: 1h30 phút = 1,5h
Quãng đường AB dài là:
60 . 1,5 = 90 (km)
Nửa quãng đường AB dài là:
90 : 2 = 45 (km)
Vận tốc xe máy là:
60 . 3/5 = 36 (km/h)
Xe máy đi hết nửa quãng đường AB trong:
45 : 36 = 1,25 (giờ)
Đáp số : 1,25 giờ

Chúc bn hok tốt nha thanghoa

 

20 tháng 10 2021

1. 10x2(x - 1) + 15xy(1 - x)

= 10x2(x - 1) - 15xy(x - 1)

= (10x2 - 15xy)(x - 1)

= 5x(2x - 3y)(x - 1)

2. Hình như sai đề

20 tháng 10 2021

mik gui lai de nha

25x2-x2+10x-2

3 tháng 1 2019

1+1=3-1=4-2=5-3=6-4=7-5=8-6=9-7=10-8=11-9=12-10=13-11=14-12=15-13=16-14=17-15=18-16=19-17=20-18

22 tháng 3 2020

Ket ban voi mk nhe

14 tháng 9 2021

Can you avoid getting sunburn by wearing a hat?

3 tháng 8 2018

Áp dụng bất đẳng thức cô - si ta có:
\(a+b\ge2\sqrt{ab}\)
\(\dfrac{1}{a}+\dfrac{1}{b}\ge\dfrac{2}{\sqrt{ab}}\)
Nhân từng vế của 2 bất đẳng thức trên ta được \(\left(a+b\right)\left(\dfrac{1}{a}+\dfrac{1}{b}\right)\ge4\)
\(\Rightarrow\dfrac{1}{a}+\dfrac{1}{b}\ge\dfrac{4}{a+b}\)

Vậy...

3 tháng 8 2018

Chứng minh: \(\left(a+b\right)\left(\dfrac{1}{a}+\dfrac{1}{b}\right)\ge4\)

\(\Rightarrow2+\dfrac{a}{b}+\dfrac{b}{a}\ge4\)

\(\Rightarrow2+\dfrac{a}{b}+\dfrac{b}{a}\ge2+2\sqrt{\dfrac{a}{b}.\dfrac{b}{a}}=2+2=4\)

\(\Rightarrow\left(a+b\right)\left(\dfrac{1}{a}+\dfrac{1}{b}\right)\ge4\)

\(\Rightarrow\dfrac{1}{a}+\dfrac{1}{b}\ge\dfrac{4}{a+b}\)

17 tháng 4 2016

ukm

17 tháng 4 2016

Cảm ơn!!! Bạn cũng z nhé!:)

Viết lại câu nha1. Mike can’t buy that car because he doesn’t have enough money.aMike can’t _______________________________________________.2. Susan looks forward to see her father soon.aSusan hopes _______________________________________________.3. She said she didn’t breaking the vase.aShe denied _______________________________________________.4. She is thinking about going picnic this weekend.aShe is _______________________________________________.5. She said she would play badminton...
Đọc tiếp

Viết lại câu nha

1. Mike can’t buy that car because he doesn’t have enough money.

aMike can’t _______________________________________________.

2. Susan looks forward to see her father soon.

aSusan hopes _______________________________________________.

3. She said she didn’t breaking the vase.

aShe denied _______________________________________________.

4. She is thinking about going picnic this weekend.

aShe is _______________________________________________.

5. She said she would play badminton with her friends this afternoon.

aShe decided _______________________________________________.

6. She can’t put up with this short of money anymore.

aShe can’t _______________________________________________.

7. These windows will have to be cleaned again.

aThese windows need_______________________________________________.

8. The police told us not to go out of this building.

aThe police warned _______________________________________________.

9.She refusedto steal  the car.

aShe denied _______________________________________________.

10. Manny said he didn’t stole the car, but he said he borrowed it.

aManny denied _______________________________________________.

2
2 tháng 6 2021

1. Mike can’t buy that car because he doesn’t have enough money.

Mike can’t afford to buy that car_____________.

2. Susan looks forward to see her father soon.

Susan hopes to see her father soon _______________________________________________.

3. She said she didn’t breaking the vase.

aShe denied breaking the vase._______________________________________________.

4. She is thinking about going picnic this weekend.

She is considering going picnic this weekend _______________________________________________.

5. She said she would play badminton with her friends this afternoon.

aShe decided to play badminton with her friends this afternoon. _______________________________________________.

6. She can’t put up with this short of money anymore.

aShe can’t stand this short of money anymore. _______________________________________________.

7. These windows will have to be cleaned again.

aThese windows need to be cleaned again. ____________________________________________.

8. The police told us not to go out of this building.

aThe police warned us  not to go out of this building._______________________________________________.

9.She refused to steal  the car.

She denied stealing the car _______________________________________________.

10. Manny said he didn’t stole the car, but he said he borrowed it.

Manny denied stealing the car._______________________________________________

2 tháng 6 2021

4 she is considering going picnic this weekend

28 tháng 12 2021

D

28 tháng 12 2021

d