Toán Lớp 9: Q = ( 1/ x – √ x – 1 / √ x – 1 ) : √ x / x- 2 √ x + 1 giúp em với e đang cần gấp a
Leave a reply
Register Now
Login
Lost Password
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Toán Lớp 9: Q = ( 1/ x – √ x – 1 / √ x – 1 ) : √ x / x- 2 √ x + 1 giúp em với e đang cần gấp a
Comments ( 1 )
DK:x > 0;x \ne 1\\
Q = \left( {\dfrac{1}{{x – \sqrt x }} – \dfrac{1}{{\sqrt x – 1}}} \right):\dfrac{{\sqrt x }}{{x – 2\sqrt x + 1}}\\
= \dfrac{{1 – \sqrt x }}{{\sqrt x \left( {\sqrt x – 1} \right)}}.\dfrac{{{{\left( {\sqrt x – 1} \right)}^2}}}{{\sqrt x }}\\
= – \dfrac{{{{\left( {\sqrt x – 1} \right)}^2}}}{x}
\end{array}\)