Solution Let the equation of the plane be
x
y
z
a
b
c
+
+
 = 1 (1)
Here
a = 2, b = 3, c = 4 Substituting the values of a, b and c in (1), we get the required equation of the
plane as 
1
2
3
4
x
y
z
+
+
=  or 6x + 4y + 3z = 12 11