288 + 290 + 292 + .... + 380 + 382 = ?
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
LN
15 tháng 8 2017
287. I’ve never read a more romantic story before.
@ It’s the most romantic story I have ver read
288. She likes to travel around the world but she doesn’t have a lot of money.
@ She wishes she had a lot of money to travel around the world
289. I haven’t met her for 3 months.
@ I last met her 3 months ago
290. She usually wore uniform when she was a student.
@ She used to wear uniform when she was a student
291. There are many beautiful places in Hồ Chí Minh City.
@ Hồ Chí Minh City has many beautiful places
292. I don’t have time to help you do this work.
@ I wish I had time to help you do this work
293. The film is more interesting than the one I last saw.
@ The film I last saw was not as interesting as the ones
17 tháng 7 2015
a) 60 - 3 ( x - 2 ) = 51
=> 3 (x - 2) = 60 - 51 = 9
=> x - 2 = 9 : 3 = 3
=> x = 3 = 2 = 5
b) 4x - 20 = 2^5 : 2^2
=> 4x - 20 = 8
=> 4x = 8 + 20 = 28
=> x = 28 : 4 = 7
c) 48751 - ( 10425 + x ) = 382^8 : 12
đề có sai ko ?
d) ( 2367 - x ) - ( 2^10 - 7 ) = 15^2 - 20
=> 2367 - x - 2^10 + 7 = 205
=> -x = 205 - 7 + 210 - 2367 = -1145
=> x = 1145
28 tháng 9 2017
câu D của bạn trần như sai rồi phải là 1146 mới là đáp án đúng
1
Đặt A = 288 + 290 + 292 + .... + 380 + 382
<=> SSH của A là : ( 382 - 288 ) : 2 + 1 = 48
=> A = ( 382 + 288 ) . 48 : 2 = 16080
Vậy A = 16080
SSH:(382-288):2+1=48
Tổng dãy số:(382+288)*48:2=16080