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1 tháng 12 2017

Giải:

Ta có thể tách vật cần cân ra để dễ tìm như sau:

\(257,5=200+50+5+2+0,5\)

Như vậy để tính chính xác nhất, ta cần dùng các quả cân sau: 200g; 50g; 5g; 2g và 500mg (tương ứng với 0,5g vì \(500mg=0,5g\))

7 tháng 2 2021

 Cau 1: B= lim 4n^2+3n+1/ (3n-1)^2 = 4/9

Cau 2: lim( can n^2+2n - can n^2 -2n =0

3 tháng 2 2017

lam di

24 tháng 9 2017

can là gì vậy bạn?

24 tháng 9 2017

\(n=\left(1+\sqrt{3}+\sqrt{5}\right)\left(1+\sqrt{3}-\sqrt{5}\right)\)

\(n=\left(1+\sqrt{3}\right)^2-\sqrt{5}^2\)

\(n=1+2.\sqrt{3}.1+3-25\)

\(n=4-25+2\sqrt{3}\)

\(n=-21+2\sqrt{3}\)

1.      Fluency in speaking English can help you get along with a lot of friends worldwide.If you can                                                                                                                                     2.      Nguyen Nhat Anh  wrote Mat Biec, which is known as the most romantic story with a sad ending.Mat Biec,which is...
Đọc tiếp

1.      Fluency in speaking English can help you get along with a lot of friends worldwide.

If you can                                                                                                                                     

2.      Nguyen Nhat Anh  wrote Mat Biec, which is known as the most romantic story with a sad ending.

Mat Biec,which is                                                                                                                                     

3.      She can’t contact her old friend because she doesn’t have his phone number.

If she                                                                                                                                            

She could kept 

1
14 tháng 1 2022

1.      Fluency in speaking English can help you get along with a lot of friends worldwide.

If you can     speak English fluently, you can get along with a lot of friends worldwide.                                                       

2.      Nguyen Nhat Anh  wrote Mat Biec, which is known as the most romantic story with a sad ending.

Mat Biec,which is written by Nguyen Nhat Anh, is known as the most romantic story with a sad ending.                                         

3.      She can’t contact her old friend because she doesn’t have his phone number.

If she   had her old friend's phone number, she could contact him.                                                                                                                                      

She could kept in touch with her old friend if she had his phone number.