(72005 + 72004) : 72004
= 72005 : 72004 + 72004 : 72004
= 72005 - 2004 + 1
= 71 + 1
= 7 + 1
= 8
~CHÚC BẠN HỌC TỐT~
Ta có : \(\left(7^{2005}+7^{2004}\right):7^{2004}\)
\(=7^{2004}\left(7+1\right):7^{2004}\)
\(=7+1=8\)
\(\left(7^{2005}+7^{2004}\right)\div7^{2004}\)
\(=7^{2005}\div7^{2004}+7^{2004}\div7^{2004}\)
\(=7+1\)
\(=8\)