so sanh cac phan so sau (10^2008)+1-(10^2009)+1 va (10^2009)+1/(10^2010)+1
A=102009+1/102010+1
b=102009+1/102008+1
so sanh A với B
so sánh hai phân số sau: 10^2008+1/10^2009+1 và 10^2009+1/ 10^2010+1
so sánh hai phân số sau: 10^2008+1/10^2009+1 và 10^2009+1/ 10^2010+1
10^2008+1/10^2009+1 < 10^2009+1/10^2010+1
So sanh 2 phan so
2009×2009+2008/2009×2009+2009 va 2009×2009+2009/2009×2009+2010
So sánh hai phân số :
\(\frac{2009.2009+2008}{2009.2009+2009}\)và \(\frac{2009.2009+2009}{2009.2009+2010}\)
so sanh cac phan so sau: 10^6+1/10^5+1 va 10^7+1/10^6+1
so sanh 2009`̉10+2009̣̉ va 2010
so sanh 2009 mu 10 + 2009 mu 9 va 2010 mu 10 dang luy thua day ban
so sanh a va b biet
a=[(20092009+1)]:[(20092010+1)]
b=[(20092008+1)]:[(20092009+1)]
\(2009A=\frac{2009^{2010}+2009}{2009^{2010}+1}=\)\(\frac{2009^{2010}+1+2008}{2009^{2010}+1}=1+\frac{2008}{2009^{2010}+1}\)
\(2009B=\frac{2009^{2009}+2009}{2009^{2009}+1}=\frac{2009^{2009}+1+2008}{2009^{2009}+1}\)\(=1+\frac{2008}{2009^{2009}+1}\)
Vì \(1+\frac{2008}{2009^{2010}+1}< 1+\frac{2008}{2009^{2009}+1}\) \(\Leftrightarrow A< B\)
\(A=\frac{2009^{2009}+1}{2009^{2010}+1}\Rightarrow2009A=\frac{2009^{2010}+2009}{2009^{2010}+1}\)
\(2009A=\frac{2009^{2010}+1}{2009^{2010}+1}+\frac{2008}{2009^{2010}+1}\)
\(2009A=1+\frac{2008}{2009^{2010}+1}\)
..... sory bn mk hơi luwoif chút nên bn tự lm tương tự vs phần B và so sánh nhé!^^
So sánh:
a,A=2009^2010+2009^2009 và B=2010^2010
b,A=10^8+2/10^8-1 và B=10^8/10^8-3
c,A=10^11+1/10^12+1 và B=10^10+1/10^11+1
Mình làm câu a) nha!!!
+) \(A=2009^{2010}+2009^{2009}\)
\(=2009^{2009}.\left(2009+1\right)\)
\(=2009^{2009}.2010\)
+) \(B=2010^{2010}=2010^{2009}.2010\)
Vì \(2010^{2009}>2009^{2009}\)nên \(2010^{2009}.2010>2009^{2009}.2010\)hay \(B>A\)
Vậy \(A< B\)
Hok tốt nha^^
Bai 1.Tim x, y biet :
2x(3y-2)+(3y-2) = -55
Bai 2 .a) So sanh : -22/45 va -51/103
b) So sanh A = 2009^2009 +1 / 2009^2010 va B = 2009^2010-2/2009^2011-2
Bai 3 :
a)Tim so tu nhien co 3 chu so , biet rang khi chia so do cho cac so 25, 28,35thi duoc cac so du lan luot la 5,8,15
b)Tim x: (x+1)+(x+2)+(x+3)+...+(x+100)=205550