So sanh :E= 20182019 - 1 phan 20182020 - 1 va F= 20182018 -1 phan 20182019 -1
So sánh : A = 2017 2018 + 2018 2019 v à B = 2017 + 2018 2018 + 2019
A = 2017 2018 + 2018 2019 > 2017 2019 + 2018 2019 = 2017 + 2018 2019 > 2017 + 2018 2018 + 2019 = B
So sánh : A = 2017 2018 + 2018 2019 v à B = 2017 + 2018 2018 + 2019
A = 2017 2018 + 2018 2019 > 2017 2019 + 2018 2019 = 2017 + 2018 2019 > 2017 + 2018 2018 + 2019 = B
So sánh: A = 2017 2018 + 2018 2019 và B = 2017 + 2018 2018 + 2019
Ta có
A = 2017 2018 + 2018 2019 > 2017 2019 + 2018 2019 = 2018 + 2018 2019
Mà 2017 + 2018 2019 > 2017 + 2018 2018 + 2019 = B
Nên A > B
Cho p/s a/b cung bot ca tu so va mau so đi 1 so tu nhiên m thi đuoc phan so moi.so sanh phan so a/b va phan so moi ( QDMS 2 Phan so cu va moi)
so sanh phan so sau:1/13^17 va 1/5^11
so sanh cac phan so sau (10^2008)+1-(10^2009)+1 va (10^2009)+1/(10^2010)+1
10^2008+1/10^2009+1<10^2009+1/10^2010+1
Tớ chỉ biết đáp án thôi
k cho mk nha
Thanks
So sanh:
A = 20102011+1 phan 20102012+1 va B =20102010+1 phan 20102011+1
\(A=\frac{2010^{2011}+1+2009}{2010^{2012}+1+2009}=\frac{2010^{2011}+2010}{2010^{2012}+2010}=\frac{2010\left(2010^{2010}+1\right)}{2010\left(2010^{2011}+1\right)}\)\(=B\)
so sanh phan so 1/2439 va 1/8313
1\243=1\(81.3)
(1\243)^9=1\((81^9.3^9)=1\(81^9.27^3)> 1\(81^9.81^3) >1\(83^12)>1\(83^13)
4 nhan a / 2 nhan b + 1 va a /b - 1 [so sanh hai phan so]