\(\left(\dfrac{1}{\sqrt{625}}+\dfrac{1}{5}+1\right):\left(\dfrac{1}{25}-\dfrac{1}{\sqrt{25}}-1\right)\)
\(=\left(\dfrac{1}{25}+\dfrac{1}{5}+1\right):\left(\dfrac{1}{25}-\dfrac{1}{5}-1\right)\)
\(=\dfrac{1+5+25}{25}:\dfrac{1-5-25}{25}\)
\(=\dfrac{31}{-29}=-\dfrac{31}{29}\)
Đúng 0
Bình luận (0)