k mk đi làm onnnnnnnnnnnnnnnnnn, thank you very much
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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 : ( 1 / 2 + 1/3 + ........+ 1 /2012 + 1/2013 ) . x = 2012/1 + 2011/2 + 2010 /3 + .....+2/2011+1/2012
Tìm x biết (2012/1+2011/2+...+1/2012)/(1/2+1/3+...+1/2013):x=-2013/2014
tìm x biết:
(1/2+1/3+...+1/2012+1/2013).x = 2012/1+2111/2+2010/3+...+2/2011+1/2012
tìm x,biet(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
Tìm x biết:
\(\left(\frac{1}{2}+\frac{1}{3}+...+\frac{1}{2012}+\frac{1}{2013}\right)\cdot x=\frac{2012}{1}+\frac{2011}{2}+\frac{2010}{3}+...+\frac{2}{2011}+\frac{1}{2012}\)
Tìm x biết:
a) \(^{2^x+2^{x+1}+2^{x+2}+2^{x+3}=480}\)
b) \(\left(\frac{1}{2}+\frac{1}{3}+...+\frac{1}{2012}+\frac{1}{2013}\right).x=\frac{2012}{1}+\frac{2011}{2}+\frac{2010}{3}+...+\frac{2}{2011}+\frac{1}{2012}\)
Mình có bài hay lắm nè
a, tìm x biết :1/1x2+1/3x5+1/5x8+......+1/x(x+2)= 1005/2011
b, so sánh 2011/2012+2012/2013+2013/2011 và 3
giải giùm mình nha !