100-99+98-97+...+4-3+2-1
Mong cac ban giup minh, minh dang can gap lam
tính tổng S = 1*2+2*3+3*4+...+99*100
CO DANG TONG QUAT LA SAO?
BAN NAO BIET THI GIUP NHE MINH DANG CAN GAP!
☹➞cac ban giup minh cau nay voi
☛ tinh tong
M = 1+\(\dfrac{1}{5}\)+\(\dfrac{3}{35}\)+...\(\dfrac{3}{9603}\)+\(\dfrac{3}{9999}\)
➜giup minh nhanh nhe minh dang can gap lam moi nguoi a
➞thank you cac ban ❕
Tim x :
a, 64 . 2x-2 = 22020
b, 21 + 3 . |x| = 3 . ( 42 - 1 )
Mong cac ban giup, minh CAN GAP !!!!!!!!!!!!!!!!!!!!!!!!
tim x biet N thuoc
a) 2-(x+3)=1+2+3+4+5+..............+99
b)(x+1)+(x+2)+(x+3)+(x+4)+...............+(x+100)=5750
giup mk nha cac ban , mk dang can gap lam
chung to :1/3+2/3^3+3/3^3+4/3^4+...+100/3^100<3/4
mong cac ban giup do lam ho minh bai nay
(a+a^2+a^3+a^4+...+a^29+a^30) chia het cho (a+1) (a thuoc N)
cac ban giup minh voi nhanh len nhe minh dang can gap
Q= 1/2! + 2/3! + 3/4! + ... + n-1/n!
Chung minh rang : Q<1
Minh dang can gap. Giup minh voi!!
7 . x - 2 . x = 505
125 : ( 23 - 22 + 3 . x ) = 5
3x + 1 + 3x + 2 - 3x = 297
Mong cac ban giup do, minh can gap !!!!!!!!
