Đặt A = \(\frac{2009^{2009}+1}{2009^{2010}+1}\)
B = \(\frac{2009^{2010}-2}{2009^{2011}-2}\)
Do 20092010- 2 < 20092011- 2 => \(B<1\)
\(B=\frac{2009^{2010}-2}{2009^{2011}-2}<\frac{2009^{2010}-2+2011}{2009^{2011}-2+2011}=\frac{2009^{2010}+2009}{2009^{2011}+2009}=\frac{2009\left(1+2009^{2009}\right)}{2009\left(1+2009^{2010}\right)}\)
\(=\frac{2009^{2009}+1}{2009^{2010}+1}=A\Rightarrow\)B < A
A=\(\frac{2009^{2009}+1}{2009^{2010+1}}\)và B=\(\frac{2009^{2010}-2}{2009^{2011}-2}\)
so sánh
So sánh :
A=\(\frac{2009^{2009}+1}{2009^{2010}+1}\)và B=\(\frac{2009^{2010}-2}{2009^{2011}-2}\)
so sanh
a)-22/45 va -51/101
b)so sanh A=\(\frac{^{2009^{2009}}+1}{^{2009^{20010}}+1}\)va B=\(\frac{2009^{2010}-2}{2009^{2011}-2}\)
Cho \(\frac{2010\cdot c-2011\cdot b}{2009}=\frac{2011\cdot a-2009\cdot c}{2010}=\frac{2009\cdot b-2010\cdot c}{2011}\)
C/m \(\frac{a}{2009}=\frac{b}{2010}=\frac{c}{2011}\)
Cho số A=2011; b khác 2009; c khác 2010 và \(\frac{a-2009}{b-2011}=\frac{b-2011}{c-2010}:\frac{2011-b}{2010-c}=\frac{2010-c}{2009-a}\)
Tìm tỉ số \(\frac{b}{c}\)?
So sánh A= 2008/2009+2009/2010+2010/2011+2011/2008 và 4
So sánh A và 4
So sánh \(\frac{10^{2009}+1}{10^{2010}+1}\frac{10^{2010}+1}{10^{2011}+1}\)
Cho \(A=\frac{2010}{2009^2+1}+\frac{2010}{2009^2+2}+...+\frac{2010}{2009^2+2009}\)
CM: A không phải số nguyên dương
\(A=\frac{2010}{2009^2+1}+\frac{2010}{2009^2+2}+...+\frac{2010}{2009^2+2009}\)
CMR: A không phải là số nguyên dương?
