\(\left(5^{103}-5^{102}-5^{101}\right):\left(5^{99}.26-5^{99}\right)\)
\(=\left(5^{103}-5^{102}-5^{101}\right):[5^{99}\left(26-1\right)]\)
\(=\left(5^{103}-5^{102}-5^{101}\right):5^{101}\)
\(=5^{103}:5^{101}-5^{102}:5^{101}-5^{101}:5^{101}\)
\(=5^2-5-1=19\)
Đã không biết làm đừng đổ cho người khác ! Đề ra đúng không biết làm bảo sai !!
\(\left(5^{103}-5^{102}-5^{101}\right)\text{ : }\left(5^{99}\cdot26-5^{99}\right)\)
\(=\left[5^{101}\left(5^2-5-1\right)\right]\text{ : }\left[5^{99}\left(26-1\right)\right]\)
\(=\left[5^{101}\cdot19\right]\text{ : }\left[5^{99}\cdot25\right]\)
\(=\left[5^{101}\cdot19\right]\text{ : }\left[5^{99}\cdot5^2\right]\)
\(=\left[5^{101}\cdot19\right]\text{ : }5^{101}\)
\(=5^{101}\cdot19\text{ : }5^{101}\)
\(=19\)
\(\left(5^{103}-5^{102}-5^{101}\right):\left(5^{99}.26-5^{99}\right)\)
=\(5^{101}\left(5^2-5-1\right):\left[5^{99}\left(26-1\right)\right]\)
=\(5^{101}.19:\left(5^{99}.25\right)\)
=\(5^{101}.19:\left(5^{99}.5^2\right)\)
=\(5^{101}.19:5^{101}\)
=19
\(\left(5^{103}-5^{102}-5^{101}\right)\text{ : }\left(5^{99}\cdot26-5^{99}\right)\)
\(=\left[5^{101}\left(5^2-5-1\right)\right]\text{ : }\left[5^{99}\left(26-1\right)\right]\)
\(=\left[5^{101}\cdot19\right]\text{ : }\left[5^{99}\cdot25\right]\)
\(=\left[5^{101}\cdot19\right]\text{ : }\left[5^{99}\cdot5^2\right]\)
\(=5^{101}\cdot19\text{ : }5^{101}\)
\(=19\)
