=55,19/24+24+19,22

=2,2+24+19,22

=26,2+19,22

=45,42

sai đề rồi bạn nhé

\(\left(138,4-83,21\right):24+24+19,22\)

\(=\left(\frac{692}{5}-\frac{8321}{100}\right):24+\left(24+\frac{961}{50}\right)\)

\(=\left(\frac{13900}{100}-\frac{8321}{100}\right):24+\left(\frac{1200}{50}+\frac{961}{50}\right)\)

\(=\frac{5579}{100}:24+\frac{1891}{50}\)

\(=\frac{5579}{2400}+\frac{90768}{2400}\)

\(=\frac{96347}{2400}\)

x = 3

y = 4

vì 21 / 28 = 21 : 7 / 28 : 7 = 3 / 4

cái này là mình rút gọn 

x = 7 và y =8 nha

giúp j vậy bn

Đề ?_?

@Cpr

#Forever

Mong bạn đưa câu hỏi đầy đủ trên phần TLCH để được trợ giúp nhé. Chứ bạn cũng không có đề đâu.

1 If Nancy didn't played trick on me in front of my classmates, I wouldn't hate her

2 We've never had a more useful English lesson than this before

26 Unless you practice speaking Englisg regularly, you can't improve your speaking skill

27 The penthouse suite which is situated on the top 2 floors, 45th and 46th is being stayed in by the singer

28 Mary asked Jim how the English language had changed over the decades

29 It was decided by us that your contract will not be renewd

30 I'm busy with revising for exams

31 On time they arrived at the police station, they were taken to an interview room

32 How about looking for the information about the history of English on the internet?

Hi em,

việc em dang bai thi public len mang xa hoi nhu the nay la viec lam vi pham quy tac thi roi nhe.

cho toi xin ma so sinh vien cua em?

Toi thay tren trang ca nhan cua em dang hoi rat nhieu cau hoi lien quan den bai thi? Vi vay toi se lap bien ban ve truong hop nay, vi tội thi khong nghiem tuc

trong sach

37 nhé bạn 

37 nhé

Đặt \(\int f\left(x\right)dx=F\left(x\right)\Rightarrow\int\limits^{17}_1f\left(x\right)dx=F\left(17\right)-F\left(1\right)\)

Từ giả thiết:

\(2x.f\left(x^2+1\right)+\dfrac{f\left(\sqrt{x}\right)}{2\sqrt{x}}=2lnx\)

Lấy nguyên hàm 2 vế:

\(F\left(x^2+1\right)+F\left(\sqrt{x}\right)=2xlnx-2x+C\)

Thay \(x=4\):

\(F\left(17\right)+F\left(2\right)=16ln2-8+C\) (1)

Thay \(x=1\):

\(F\left(2\right)+F\left(1\right)=-2+C\) (2)

Trừ vế cho vế (1) cho (2):

\(F\left(17\right)-F\left(1\right)=16ln2-6\)

Vậy \(\int\limits^{17}_1f\left(x\right)dx=16ln2-6\)

761A

762C

763A

764D

765D

766B

767D

768C

797 A

798B

799C

800C

765