Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(A=\frac{2006^{2006}+1}{2006^{2007}+1}\) VÀ \(B=\frac{2006^{2005}+1}{2006^{2006}+1}\)
Ta có: \(A=\frac{2006^{2006}+1}{2006^{2007}+1}< 1\)
Nên \(A=\frac{2006^{2006}+1}{2006^{2007}+1}< \frac{2006^{2006}+1+2005}{2006^{2007}+1+2005}=\frac{2006^{2006}+2006}{2006^{2007}+2006}\)
\(=\frac{2006.\left(2006^{2005}+1\right)}{2006.\left(2006^{2006}+1\right)}\)
\(=\frac{2006^{2005}+1}{2006^{2006+1}}=B\)
Vậy \(A< B\)
mik ko bít
I don't now
................................
.............
Vì \(\frac{2005^{2005}+1}{2005^{2006}+1}\) < 1
Nên \(\frac{2005^{2005}+1}{2005^{2006}+1}\) < \(\frac{2005^{2005}+1+2004}{2005^{2006}+1+2004}\)
Ta có: \(\frac{2005^{2005}+1+2004}{2005^{2006}+1+2004}=\frac{2005^{2005}+2005}{2005^{2006}+2005}=\frac{2005\left(2005^{2004}+1\right)}{2005\left(2005^{2005}+1\right)}=\frac{2005^{2004}+1}{2005^{2005}+1}\)
Nên: \(\frac{2005^{2005}+1}{2005^{2006}+1}\) < \(\frac{2005^{2004}+1}{2005^{2005}+1}\)
=> A < B
bang 1
2005*2006-1 (2004+1)*2006-1 2004*2006+2006-1 2004*2006+ ( 2006-1 ) 2004*2006+2005
--------------------------- = -------------------------------- = ---------------------------------------- = ----------------------------------= -----------------------------
2006*2004+2005 2006*2004+2005 2006*2004+2005 2006*2004+2005 2006*2004+2005
=1 ( tử số = mẫu số )