Toán Lớp 9: Tìm m để (d1) // (d2) biết:
a) (d1): y = (m – 3)x + 3, (d2): y = -x + m
b) (d1): y = (5 – 2m)x + 3, (d2): y = 3x + m – 1
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: Tìm m để (d1) // (d2) biết:
a) (d1): y = (m – 3)x + 3, (d2): y = -x + m
b) (d1): y = (5 – 2m)x + 3, (d2): y = 3x + m – 1
Comments ( 1 )
a)m = 2\\
b)m = 1
\end{array}\)
Do:\left( {d1} \right)//\left( {d2} \right)\\
a)\left\{ \begin{array}{l}
m – 3 = – 1\\
3 \ne m
\end{array} \right.\\
\to \left\{ \begin{array}{l}
m = 2\\
m \ne 3
\end{array} \right.\\
b)\left\{ \begin{array}{l}
5 – 2m = 3\\
3 \ne m – 1
\end{array} \right.\\
\to \left\{ \begin{array}{l}
2m = 2\\
m \ne 4
\end{array} \right.\\
\to \left\{ \begin{array}{l}
m = 1\\
m \ne 4
\end{array} \right.
\end{array}\)