\(P=\frac{2010}{2011}+\frac{2011}{2012}+\frac{2012}{2013}\)
\(P>\frac{2010}{2011+2012+2013}+\frac{2011}{2011+2012+2013}+\frac{2012}{2011+2012+2013}\)
\(P>\frac{2010+2011+2012}{2011+2012+2013}\)
\(P>Q\)
So sanh P va Q
P=\(\frac{2010}{2011}+\frac{2011}{2012}+\frac{2012}{2013}\)
Q=\(\frac{2010+2011+2012}{2011+2012+2013}\)
So sánh
A=2011^2012-2011^2011 và 2011^2013-2011^2012
tìm x biết ( 1/2 + 1/3 + ... + 1/2012 + 1/2013 ) .x = 2012/1 + 2011/2 + 2010/3 + ... + 2/2011 + 1/2012
So sánh
\(A=\dfrac{2011+2012}{2012+2013}\) và \(B=\dfrac{2011}{2012}+\dfrac{2012}{2013}\)
So sánh:
A=\(\dfrac{2010}{2011}+\dfrac{2011}{2012}\) và B= \(\dfrac{2010+2011}{2011+2012}\)
So sánh 2 phân số :
\(A=\frac{2012^{2012}+1}{2012^{2013}+1}\) và \(B=\frac{2012^{2011}+1}{2012^{2012}+1}\)
So sánh A và B:
1. A=\(\dfrac{79^{2011} - 5}{79^{2011} + 8}\) và B=\(\dfrac{79^{2012} - 6}{79^{2011} + 7}\)
2. A=\(\dfrac{43}{2011^{2012}}\)+\(\dfrac{79}{2011^{2013}}\) và B=\(\dfrac{79}{2011^{2012}}\)+\(\dfrac{43}{2011^{2013}}\)
3. A=\(\dfrac{2010}{2011}\):\(\dfrac{2011}{2012}\) và B=\(\dfrac{2010+2011}{2011+2012}\)
4. A=\(\dfrac{n}{2n+1}\) và B=\(\dfrac{3n+1}{6n+3}\)
Thanks mấy bạn trước nha!!
1,So sánh :
A=\(\dfrac{2011+2012}{2012+2013}\) ; B=\(\dfrac{2011}{2012}+\dfrac{2012}{2013}\)
2,Cmr:
\(\dfrac{1}{4.7}+\dfrac{1}{7.10}+...+\dfrac{1}{37.40}< \dfrac{1}{3}\)
\(A=\dfrac{5^{2011}-5^{2010}+5^{2009}-5^{2008}+....+5-1}{5^{2013}-5^{2012}+5^{2011}-5^{2010}+....+5-1}\) \(B=\dfrac{5^{2009}-5^{2008}+5^{2007}-5^{2006}+....+5-1}{5^{2011}-5^{2010}+5^{2009}-5^{2008}+....+5-1}\)
So sánh A và B
