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9 tháng 4 2023

Ở đây, bạn có thể sử dụng vòng for lặp để tình tổng:

#include <iostream>

using namespace std;

int main()
{
    int temporary=0;
    for(int i=1;i<=10;i++){
        temp+=i;
    }
    cout<<temporary;
    return 0;
}
tuy nhiên, có cách khác dễ hơn là tính theo công thức;

#include <iostream>

using namespace std;

int main()
{
    int temporary=(10/2)*(10+1);
    cout<<temporary;
    return 0;
}

(Code được viết theo ngôn ngữ c++)

GL
9 tháng 4 2023

uses crt;

var s,i:integer;

begin

s:=0;

for i:=1 to 100 do s:=s+i;

write('Tong cac so tu 1 den 100 la: ',S);

readln;

end.

các best t.anh giải hộ mik với   Worksheet (Week 31)Nhắc nhở: Mỗi lần bạn rời khỏi màn hình kiểm tra, hệ thống sẽ lưu lại và báo cáo. (3đ)Choose the word that differs from the other three in the position of primary stress. Question 1: connection   battery   scientist   internet Question 2: decisive   electric   uneasy   impolite Question 3: satisfaction   uncomfortable   impolitely   unemployment (7đ)Choose the correct answer to complete each of the...
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các best t.anh giải hộ mik với

 

Worksheet (Week 31)Nhắc nhở: Mỗi lần bạn rời khỏi màn hình kiểm tra, hệ thống sẽ lưu lại và báo cáo.

(3đ)Choose the word that differs from the other three in the position of primary stress.

Question 1: connection   battery   scientist   internet

Question 2: decisive   electric   uneasy   impolite

Question 3: satisfaction   uncomfortable   impolitely   unemployment

(7đ)Choose the correct answer to complete each of the following sentences.

Question 4:Peter __________ dinner when you get home.

   will be cooking   has cooked   cooks   cooked

Question 5:I think the factory __________ its workers with robots.

   isn't going to replace   won't replacewon't    have replaced   doesn't replace

Question 6:Tom __________ his marriage anniversary this time next week.

has celebratedwill    have celebrated   will be celebrating   celebrates

Question 7:Modern freezing __________ enable our food to be stored for weeks.

   Means   techniques   manners   skills

Question 8:She became a(n) __________ because she was interested in coding.

   Chemist   astronaut   software developer   explorer

Question 9:He works as a(n) __________. He studies the buildings, graves, tools, and other objects of people who lived in the past.

Conservationist   architecture   physicist   archaeologist

Question 10:Consider becoming a(n) __________ if you want to learn about different cultures.

   Mechanic   explorer   physician   engineer

(4đ)Fill in each blank with the correct form of the word on brackets.

Question 11:It'sto turn back time and change the past, but you can learn from it. (possibility)

Question 12:Thewas disappointed to see so much litter on the beach. (conserve)

Question 13:He was tooto wait for the elevator and took the stairs instead. (patience

Question 14:The new building looks completelyin this historic part of town. (nature)

(4đ)Choose the sentence that best rewrites the sentence given.

Question 15:‘I saw you walking your dog yesterday,' she told me.

She said that I had seen you walking her dog the previous day.

She said that she had seen you walking my dog the following day.

She said that she saw me walking my dog the previous day.

She said that she had seen me walking my dog the previous day.

Question 16:‘I want to see new places,' Tony said

Tony said that I wanted to see new places.

Tony said that he wanted to see new places.

Tony said that he had wanted to see new places.

Tony said that he wants to see new places.

Question 17:‘I will have to cancel my dental appointment,' Liz said.

Liz said that she would have to cancel her dental appointment.

Liz said that I would have to cancel my dental appointment.

Liz said that she will have to cancel her dental appointment.

Liz said that she would have to cancel my dental appointment.

Question 18:‘We have visited this castle several times,' Mr. Smith said.Mr.

Smith said that we had visited this castle several times.Mr.

Smith said that they visited that castle several times.Mr.

Smith said that they had visited that castle several times.Mr.

Smith said that we visited this castle several times.

0
AH
Akai Haruma
Giáo viên
30 tháng 4 2023

Lời giải:
Áp dụng BĐT AM-GM ta có:
$\frac{a^2}{4}+b^2\geq 2\sqrt{\frac{a^2}{4}.b^2}=ab$

$\frac{a^2}{4}+c^2\geq ac$

$\frac{a^2}{4}+x^2\geq ax$

$\frac{a^2}{4}+y^2\geq ay$

Cộng theo vế các BĐT trên ta có:
$a^2+b^2+c^2+x^2+y^2\geq ab+ac+ax+ay=a(b+c+x+y)$ (đpcm)

9 tháng 4 2023

1608 nha 

cho mik 1 tích nha

 

9 tháng 4 2023

mik trả lời nhầm

cho mik xin lỗi

 

10 tháng 4 2023

 

Thời điểm nào về thế kỉ XX, nước Nga dùng lịch Julian và lịch Gregorian có thời gian khác nhau là 13 ngày là vào đầu thế kỷ 20,

 
19 tháng 4 2023

Nhà thờ Nga vẫn dùng lịch Julian. Trong khoảng thời gian từ 1700-1918, lịch của Nga và châu Âu khác nhau hơn 10 ngày. Vào đầu thế kỷ 20, sự khác biệt giữa lịch Julian và lịch Gregorian là 13 ngày.