Given \(A=1+2+2^2+2^3+...+2^{59}\) and \(B=4^{25}\times1024\).
To compare: \(A.......B\) .
Compare: A = 1+3+5+.....+139/70 and B = 2+4+6+.....+138/69
Answer: A ....... B
1. Find x, given that:
\(\left(x+\frac{1}{3}\right)+\left(x+\frac{3}{40}\right)+\left(x+\frac{3}{88}\right)=\frac{31}{22}\)
2. The arithmatic average of three numbers is equal to 13.5 . The average of the first number and second number is 13, and the average of the second number and third number is 13.85 . Find the three numbers.
3. Compare A and B, given that:
A = 2.015 x 201.7
B = 20.16 x 20.16
Given 𝐴 = 9𝑥2 + 8 − 12𝑥 and 𝐵 = 2.
To compare: 𝐴 …𝐵.
We have : \(A=\)\(9x^2+8-12\)
=\(\left[\left(3x\right)^2-2.3x.2+4\right]+4\)
\(=\left(3x-2\right)^2+4\ge4\)(first)
But \(B=2\)(2)
From (1) and (2)
\(\Rightarrow A>B\)
3. Now compare photos 1 and 2. Describe a) the main similarities and b) the main differences. Use the phrases below to help you.
(Bây giờ hãy so sánh các bức ảnh 1 và 2. Hãy mô tả a) những điểm giống nhau chính và b) những điểm khác biệt chính. Sử dụng các cụm từ dưới đây để giúp bạn.)
Similarities (Giống nhau)
The common theme in the photos is ...
(Chủ đề chung giữa hai bức tranh là…)
You can see ... in both photos.
(Bạn có thể thấy … trong cả hai bức tranh.)
Both photos show ...
(Cả hai bức tranh cho thấy …)
In both photos there are ...
(Trong cả hai bức tranh có …)
Differences (Khác biệt)
The first photo shows ..., whereas the second photo shows ...
(Bức tranh thứ nhất có …, trong khi bức tranh thứ hai có …)
In the first photo..., but in the second photo ...
(Trong bức tranh thứ nhất, … nhưng trong bức tranh thứ hai …)
One obvious difference is (that) ...
(Một sự khác nhau rất rõ ràng là …)
Unlike the first photo, the second photo shows
(Không giống như bức tranh thứ nhất, bức tranh thứ hai cho thấy …)
In contrast to the first photo, the second photo ...
(Đối lập với bức tranh thứ nhất, thì bức tranh thứ hai…)
| Picture 1 (Ảnh 1) | Picture 2 (Ảnh 2) |
the main similarities (điểm giống nhau chính) | they are school activities (chúng đều là hoạt động của trường) joined by a group of students (tham gia bởi các học sinh) | |
the main differences (điểm khác nhau chính) | gentle activity (hoạt động nhẹ nhàng) | strenuous activity (hoạt động vất vả) |
cho A=1+2+22+23+....+259 và B=425.1024
so sánh A....B
Ta có: \(A=1+2+2^2+...+2^{59}\)
\(\Rightarrow2A=2+2^2+2^3+...+2^{60}\)
\(\Rightarrow2A-A=2^{60}-1\)
\(\Rightarrow A=2^{60}-1\)
\(B=4^{25}.1024=2^{30}.2^{10}=2^{40}\)
Vì \(2^{60}-1>2^{40}\) nên A > B
Vậy A > B
compare A=232-1 and B=3(22+1)(24+1)(28+1)(216+1)
(giải bằng tiếng anh nha cảm ơn các bạn!!!
Write full sentences to make a passage, using the suggested words and phrases given.
1. I/grow up/small/town/northeast/England/./
2. It/the coast/,/next/sea/./And/now/I/live/London/./which/much/big/place/compare/
to where/I/grew up/./
Write full sentences to make a passage, using the suggested words and phrases given.
1. I/grow up/small/town/northeast/England/./
i grew up in a small town in the northest of england
2. It/the coast/,/next/sea/./And/now/I/live/London/./which/much/big/place/compare/
to where/I/grew up/./
it is the coast next to the sea. and now i live in london which has much big place compare to where i grew up
Question 1:
The least common multiple of 330; 65; 15 is
Question 2:
Given seven numbers: 25; 17; 39; 43; 239; 1021; 1023.
The composite numbers are
(Write numbers in order from the least to the greatest and use ";")
Question 3:
The common factors of 18 and 27 are
(Write numbers in order from the least to the greatest and use ";")
Question 4:
Given the set of even numbers: {2; 4; 6; …; 100}.The number of elements is
Question 5:
Find four integer numbers a,b,c,d such that
a + b + c + d = 1
a + c + d = 2
a + b + d = 3
a + b + c = 4
Answer: (a;b;c;d)=()
Question 6:
Find a four-digit natural number that is less than 2015.If the thousands digit is erased,the number will be decreased by 9 times.
Answer:The number is
Question 7:
Calculate: 1×2+2×3+⋯+100×101=
Question 8:
The term of the expression A=1-7+13-19+25-31+⋯ is
Question 9:
Given the expression A= ...
Find the value of n such that 2A+3=
Answer: n=
Question 10:
A natural number has six digits and the units digit is 4.If the units digit is moved to the first row then the number will be increasedby 4 times.The number is
a. [0.8x(4/5x1.25)]/(0.64-1/25) + [(1.08-2/25):4/7]/[(59/9-13/4)x36/17]
b.(0.4-2/9+2/11)/(1.4-7/9+7/11) - (1/3-0.25+1/5)/(7/6-0.875+0.7)