2013*x+x*1/2013-2013=1/2013
2013 x X + X x 1/2013 - 2013 = 1/2013
Xx(2013+1/2013)=1/2013+2013
X=(1/2013+2013):(1/2013+2013)
X=1
tìm x giải ra cho 10 tick
2013*x+x*(1/2013)-2013=1/2013
GIẢI RA CHO 10 TICK
2013*x +x* 1/2013 = 1/2013 + 2013
x* (2013+1/2013)=1/2013+2013
x = 1
tim x; (1+1/2+1/3+...+1/2013).x+2013=2014/1+2015/2+...+4026/2013
câu này cũng không được tick hả thầy @phynit
2013x y + y x 1/2013 - 2013=1/2013
\(2013.y+y.\frac{1}{2013}-2013=\frac{1}{2013}\)
\(\Rightarrow2013.y+y.\frac{1}{2013}=\frac{1}{2013}+2013\)
\(\Rightarrow y.\left(2013+\frac{1}{2013}\right)=2013+\frac{1}{2013}\)
\(\Rightarrow y=1\)
tim x ;
(1+1/2+1/3+...+1/2013).x+2013=2014/1+2015/2+...+4026/2013
Tìm x: (1+1/2+1/3+...+1/2013).x+2013=2014/1+2015/2+...+4025/2012+4026/2013
Tìm x , biết : (1+1/2+1/3+...+1/2013).x+2013=2014/1+2015/2+...+4026/2013
2013*X+X*\(\frac{1}{2013}\)-2013=\(\frac{1}{2013}\)
(1 – 2 + 3 – 4 + 5 – 6 + 7 – 8 +........– 98 + 99) x (2013 x 6 – 2013 – 2013 x 5)
(1-2+3-4+.....-98+99)x(2013x6-2013-2013x5)
=(1-2+3-4+....-98+99)x[ 2013x(6-1-5)]
= (1-2+3-4+....-98+99)x(2013x0)
= (1-2+3-4+....-98+99)x0 = 0