x+(x+1)+(x+2)+(x+3)+...+(x+2012)=2033130
\(\Rightarrow x+0+x+1+x+2+x+3+...+x+2012=2033130\)
\(\Rightarrow x\times2013+\left(0+1+2+3+...+2012\right)=2033130\)
\(\Rightarrow x\times2013+2025078=2033130\)
\(\Rightarrow x\times2013=2033130-2025078\)
\(\Rightarrow x\times2013=8052\)
\(\Rightarrow x=8052\div2013\)
\(\Rightarrow x=4\)
tìm x
a ,x-7/4+x-6/3+x-5/3+x+81/7=0
b,x-1/2013+x-2/2012+x+3/2011+...+x-2012/2=2012
c(1/1x101=1/2x102+1/3x103+1/4x164+1/10x110)x X =(1/1x11+1/2x12+...+1/100x110)
ai nhanh mình tick
Cho B = 1 x 2 x 3 x ... x 2012 x (1+1/2+1/3+...+1/2012
Chứng minh rằng B chia hết cho 2013
Tìm x biết:
a) \(^{2^x+2^{x+1}+2^{x+2}+2^{x+3}=480}\)
b) \(\left(\frac{1}{2}+\frac{1}{3}+...+\frac{1}{2012}+\frac{1}{2013}\right).x=\frac{2012}{1}+\frac{2011}{2}+\frac{2010}{3}+...+\frac{2}{2011}+\frac{1}{2012}\)
tìm x,biet(1/2+1/3+.............+1/2012+1/2013).x=2012/1+2011/2+2010/3+......+2/2011+1/2012
Tìm x biết (1/2+1/3+...+1/2012+1/2013).x = 2012/1+2011/2+2010/3+...+2/2011+1/2012
Tìm x biết 3-x/2012 + 4-x/2011 = 2-x/2012 + 1-x/2014
tìm x biết:
(1/2+1/3+...+1/2012+1/2013).x = 2012/1+2111/2+2010/3+...+2/2011+1/2012
tìm X biết : ( 1 / 2 + 1/3 + ........+ 1 /2012 + 1/2013 ) . x = 2012/1 + 2011/2 + 2010 /3 + .....+2/2011+1/2012
tìm x (1/2+1/3+...+1/2013) *x= 2012 +2011/2+2010/3+...+2/2011+1/2012
