7*24*28-49*19-21*35
mong mọi người giúp đỡ!! em cảm ơn mọi người ạ
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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
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 \(\int\limits^{17}_1f\left(x\right)dx=16ln2-6\)
mọi người giúp em với
7 x 24 x 28 - 49 x 19 - 21 x 35
= 7 x 24 x 28 - 7 x 7 x 19 - 21 x 7 x 5
= 7 x ( 24 x 28 - 7 x 19 - 21 x 5 )
= 7 x 434
= 3038