CC
4
K
Khách
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IL
15
24 tháng 6 2016
Số số hạng là :
9 - 1 + 1 = 9 ( số hạng )
Tổng trên là :
( 1 + 9 ) x 9 : 2 = 45
Đáp số : 45
Click cho mik nha !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
NV
4
TK
8
NT
9
NL
Nguyễn Lê Phước Thịnh
CTVHS
30 tháng 9 2025
Số số hạng của dãy số là:
10-0+1=11(số)
Tổng của dãy số là: \(\left(10+0\right)\times\frac{11}{2}=10\times\frac{11}{2}=5\times11=55\)
5 tháng 10 2025
8888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888+999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999=bao nhiêu?
TN
7
DH
8
16 tháng 4 2018
I dont rảnh!!
trước khi đăng hãy đọc nội quy ít nhất 100 lần
7 tháng 7 2019
Bạn đừng đăng câu hỏi linh tinh lên diễn đàn nhé.
~ Học tốt ~
1+2+3+4+5+6+7+8+792+793+794+795+796+797+798+799
Số cần tìm là:
1+2+3+4+5+6+7+8+792+793+794+795+796+797+798+799=6400
Đáp số:6400
1+2+3+4+5+6+7+8+792+793+794+795+796+797+798+799
bằng bao nhiêu
=>1+2+3+4+5+6+7+8+792+793+794+795+796+797+798+799 = 6400
Chúc bạn học tốt !
1+2+3+4+5+6+7+8+792+793+794+795+796+797+798+799=?
=6400
hok tốt !
1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 792 + 793 + 794 + 795 + 796 + 797 + 798 + 799
= ( 1 + 799 ) + ( 2 + 798 ) + ( 3 + 797 ) + ( 4 + 796 ) + ( 5 + 795 ) + ( 6 + 794 ) + ( 7 + 793 ) + ( 8 + 792 )
= 800 + 800 + 800 + 800 + 800 + 800 + 800 + 800
= 800 x 8
= 6400