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19 tháng 12 2016

\(2\times3=6\)

19 tháng 12 2016

2*3=6 bạn nhé

26 tháng 6 2017

X - 6 : 2 - (48 - 24) : 2 : 6 - 3 = 0

X - 3 - 24 : 2 : 6 -  3 = 0

X - 3 - 2 - 3 = 0

X = 0 + 3 + 2 + 3

X = 8

26 tháng 6 2017

X - 6 : 2 - ( 48 - 24 ) : 2 : 6 - 3 = 0

X - 6 : 2 - 24 : 2  : 6 - 3 = 0

X - 3 - 12 : 6 - 3 = 0

X - 3 - 2 - 3 = 0

X = 0 + 3 + 2 + 3 

X = 8

17 tháng 7 2016

\(\frac{x+3}{8}=\frac{2}{x-3}\)

\(\left(x+3\right)\times\left(x-3\right)=2\times8\)

\(x^2-3^2=16\)

\(x^2-9=16\)

\(x^2=16+9\)

\(x^2=25\)

\(x^2=\left(\pm5\right)^2\)

\(x=\pm5\)

Vậy x = 5 hoặc x = -5

 

 

17 tháng 7 2016

\(\frac{x+3}{8}=\frac{2}{x-3}\)

\(\Rightarrow\left(x+3\right)\left(x-3\right)=2.8=16\)

\(\Rightarrow x^2-3^2=16\)

\(\Rightarrow x^2=16+3^2=25\)

\(\Leftrightarrow\left[\begin{array}{nghiempt}x=5\\x=-5\end{array}\right.\)

1. I want you to help me carry my bags.Can __________________________________________________________________?2. Do you want me to warm the milk for you?Shall _________________________________________________________________?3. I want you to help me with math problem.Will __________________________________________________________________?4. He climbed the tree because he wanted to get a better view.He climbed the tree so ____________________________________________________5. She is studying...
Đọc tiếp

1. I want you to help me carry my bags.

Can __________________________________________________________________?

2. Do you want me to warm the milk for you?

Shall _________________________________________________________________?

3. I want you to help me with math problem.

Will __________________________________________________________________?

4. He climbed the tree because he wanted to get a better view.

He climbed the tree so ____________________________________________________

5. She is studying very hard because she doesn’t want to fail in the exam.

She is studying very hard in ________________________________________________

6. Harry left early because he didn’t want to miss the train.

Harry left early so as _____________________________________________________

7. He said nothing because he didn’t want to make his mother angry.

In order ________________________________________________________________

8. I’ll give you a map so that you can find the way all right.

I’ll give you a map so ______________________________________________________

9. I promise to pay you back on Saturday.

I’ll _____________________________________________________________________

10. I promise not to talk to Richard again.

I ______________________________________________________________________

 

0
11 tháng 5 2018

1. will-help

2. doesn't-won't help

3. will-do-doesn't help

Tick cho mik nha

12 tháng 5 2018

1. She (help) ..will help.. if I (help) ..help.. her

2. If she (not help) ..doesn't help.. me I (not help) ..won't help.. her

3. What ..will.. you ..do.. if she (not help) ..doesn't help.. you?

    \(\dfrac{3}{5}+\dfrac{5}{7}\) x \(\dfrac{3}{5}-\dfrac{9}{7}\) x \(\dfrac{3}{5}\)

\(=\dfrac{3}{5}+\left(\dfrac{5}{7}-\dfrac{9}{7}\right)\) x \(\dfrac{3}{5}\)

\(=\dfrac{3}{5}-\dfrac{4}{7}\) x \(\dfrac{3}{5}\)

\(=\dfrac{3}{5}-\dfrac{12}{35}\)

\(=\dfrac{21}{35}-\dfrac{12}{35}=\dfrac{21-12}{35}=\dfrac{9}{35}\)

 

 

27 tháng 12 2018

24 - 16(x - 1/2) = 23

=> 16(x - 1/2) = 24 - 23

=> 16(x - 1/2) = 1

=> x - 1/2 = 1/16

=> x = 1/16 + 1/2

=> x = 9/16

27 tháng 12 2018

\(24-16(x-\frac{1}{2})=23\)

\(16(x-\frac{1}{2})=24-23\)

\(16(x-\frac{1}{2})=1\)

\(x-\frac{1}{2}=\frac{1}{16}\)

\(x=\frac{1}{16}+\frac{1}{2}\)

\(x=\frac{9}{16}\)

Vậy số thực x cần tìm là \(\frac{9}{16}\)

Chúc bạn hok tốt ~

17 tháng 4 2017

Ta có: 3A=3+\(^{3^2+3^3+3^4+3^5+...+3^{2012}+3^{2013}}\)

\(\Rightarrow\)3A-A=2A=(\(3+3^2+3^3+3^4+...+3^{2013}\)) - (\(1-3^{ }-3^2-3^3-3^4-...-3^{2012}\))

\(\Rightarrow\)2A=\(3^{2013}-1\)\(\Rightarrow\)A=\(\left(3^{2013}-1\right):2\)\(\Rightarrow\)B-A=(\(^{\left(3^{2013}:2\right)-\left(\left(3^{2013}-1\right):2\right)\Rightarrow}\)

17 tháng 4 2017

A = 1 + 3 + 32 +...+ 32012

3A = 3 + 32 + 33 +...+ 32013

3A - A = (3 + 32 + 33 +...+ 32013) - (1 + 3 + 32 +...+ 32012)

2A = 32013 - 1

A = \(\frac{3^{2013}-1}{2}\)

=> B - A = \(\frac{3^{2013}}{2}-\frac{3^{2013}-1}{2}=\frac{3^{2013}-\left(3^{2013}-1\right)}{2}=\frac{3^{2013}-3^{2013}+1}{2}=\frac{1}{2}\)

1 tháng 10 2017

Tích mik nha

Tổng số ngô của 2 kho là

52250+37750=90000kg

Số ngô ở kho 2 sau khi chuyển là:

90000:(2+3)x2=36000kg

Số ngô cần chuyển là:

37750-36000=1750kg

Bạn thử cộng 1750 với số ngô kho 1 để kiểm tra có đúng 3 phần không . 1 phần bằng 18000

1 tháng 10 2017

tổng số ngô 52250+37750=90000(kg)

sợ ngộ khó 2 khi chuyển 90000/5*2=36000(kg)

chuyển từ khó 2 37750-36000=1750(kg)