2009 - Ix-2009I = x
=> Ix-2009I = 2019 - x
TH1: x - 2019 = 2019 - x
=> x + x = 2019 + 2019
=> 2x = 2. 2019
=> x = 2019
TH2: x - 2019 = -(2019-x)
=> x - 2019 = - 2019 + x
=> - 2019 + 2019 = x - x
=> 0 = 0
=> 2009 - Ix-2009I = x thỏa mãn với mọi x
Các câu hỏi tương tự
Tìm x
2009+ Ĩx-2009I = 0
tim x,y biet Ix-1I+Ix-2I+Iy-3I+Ix-4I=3
tim x nguyen thoa man :Ix+1I+Ix-2I+Ix+7I=5x-10
tim x
a.Ix+5I+Ix-4I=4x-2
b.Ix+1I+Ix+2I+...+Ix+2015I=2016x
Bai 1.Tim x, y biet :
2x(3y-2)+(3y-2) = -55
Bai 2 .a) So sanh : -22/45 va -51/103
b) So sanh A = 2009^2009 +1 / 2009^2010 va B = 2009^2010-2/2009^2011-2
Bai 3 :
a)Tim so tu nhien co 3 chu so , biet rang khi chia so do cho cac so 25, 28,35thi duoc cac so du lan luot la 5,8,15
b)Tim x: (x+1)+(x+2)+(x+3)+...+(x+100)=205550
tim x biết |x+2008|+|x+2009|=1
tim x biet
x + 4/2009 + x + 3 / 2010 = x + 2/2011 + x + 1/2012
tim x biết x+2 / 2012 + x+3 / 2011 = x+4 / 2010 + x+5 / 2009
Tim gia tri cua x va y de bieu thuc C = -|x-2|-|y-3|-2009 co gia tri lon nhat ,tim gia tri lon nhat do