https://olm.vn//hoi-dap/question/1282839.html?auto=1
K
Khách
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
Những câu hỏi liên quan
7 tháng 8 2018
\(A=3^{-2}.\left[\left(\dfrac{2}{3}\right)^7+\left(\dfrac{2}{3}\right)^7+...+\left(\dfrac{2}{3}\right)^7\right]\) (có 7 số hạng \(\left(\dfrac{2}{3}\right)^7\))
\(=\dfrac{1}{3^2}.7.\dfrac{2^7}{3^7}\)
\(=\dfrac{7.2^7}{3^9}\)
\(=\dfrac{\dfrac{7}{4}.2^9}{3^9}\)
\(=\left(\sqrt[9]{\dfrac{7}{4}}\right)^9.\left(\dfrac{2}{3}\right)^9\)
\(=\left(\sqrt[9]{\dfrac{7}{4}}.\dfrac{2}{3}\right)^9\)
Mình làm ko chắc chắn lắm
PN
0
W
1
10 tháng 6 2017
Tham khảo nhs!!
Câu hỏi của Đứa Con Của Băng - Toán lớp 7 | Học trực tuyến
Chúc bn học tốt!!
K
22 tháng 8 2018
Past 1:
Directions :complete each sentence with "there" and the verb "be" in the past tense (was or were).Some sentences are negetives (10 points)mình ví dụ câu 1 nha
1) There was a car accident just ten minutes ago.
2) There were several people hurt.
3) There were a lot of police at the scene.
4) There wasn't any news of it on TV . (negative)
5 ) There I was ,watching helplessly.
6) There wasn't anything anyone could do. (negative)
7) There was a big party last night.
8 ) A lot of people were there
9) There was a lot of noise.
10 ) My friend,Bob, was there
GB
0
GB
1