(M−1)X+2 MY+7Z+4=0 ; MP (Q)
Câu 11: Cho mp (P):
(m−
1)
x+
2 my
+7
z+
4
=0
; mp (Q):
2
x −
3
y
+
2
z+
4=0
. Để (P)
(Q) thì m = ?
A.
m = –1
B. m = –5
C. m = 3
D. m = 1
Câu 11: Cho mp (P):
(m−
1)
x+
2 my
+7
z+
4
=0
; mp (Q):
2
x −
3
y
+
2
z+
4=0
. Để (P)
(Q) thì m = ?
A.
m = –1
B. m = –5
C. m = 3
D. m = 1