TH1: x<-2020
A=-x-2020-x-1=-2x-2012
TH2: -2020<=x<-1
A=x+2020-x-1=2019
TH3: x>=-1
A=x+2020+x+1=2x+2021
x +3*1/2=(-2000+-2000+-2000)*(-2001+-2001+-2001)*.......*(2000+2000+2000)
TÌM X ?
x + ( x + 1 ) + ( x + 2 ) + ..... + 2000 = 2000 Tìm x
tìm x>1 biết :5x X (X -2000) - X +2000=0
tìm x>1 biết:5x(x-2000)-x+2000=0
tìm x > 1 biết : 5x(x - 2000)-x+2000=0
tìm x > 1 biết : 5x(x-2000)-x+2000=0
5x ( x - 2000 ) - x + 2000 = 0
biết x > 1
x>1 biết 5x(x-2000)-x+2000=0
x=?
Hợp lí, mk tick
Tìm x thuộc Z biết:
x+(x+1)+(x+2)+...+1999+2000=2000
Giúp vs ạ !!!
Tìm x, biết :
a, \(\left(\frac{1}{1\cdot2\cdot3}+\frac{1}{2\cdot3\cdot4}+...+\frac{1}{98\cdot99\cdot100}\right)x=-3\);
b, \(\left(\frac{\frac{2000}{1}+\frac{1999}{2}+...+\frac{1}{2000}}{\frac{1}{2}+\frac{1}{3}+...+\frac{1}{2001}}\right)x=\frac{-1}{5}\).
c,\(\left(\frac{\frac{2000}{1}+\frac{1999}{2}+...+\frac{1}{2000}+2000}{1+\frac{1}{2}+\frac{1}{3}+...+\frac{1}{2001}}\right):x=\frac{-2001}{2002}\).
