Ta có :
VP:
\(2008^{2009}=\left(1+2007\right)^{2009}\)
= \([\left(1+2007\right).\left(1+2007\right)]^{2007}\)
= \(\left(2008.2008\right)^{2007}\)
VT:
\(2007^{2008}+2007^{2007}\)
= \(2007.2007^{2007}+2007^{2007}\) .1
= \(2007^{2007}\left(2007+1\right)\)
= \(2008.2007^{2007}\)
VP: \(\left(2008.2008\right)^{2007}\)
VT: \(2008.2007^{2007}\)
(Mũ giống nên bỏ số mũ qua 1 bên nhé!)
Mà 2008.2008 > 2008.2007
=> VP > VT
=> 20082009 > 20072008+ 20072007