Question
Mathematics Question on types of differential equations
If the mirror image of the point (2, 4, 7) in the plane 3 x – y + 4 z = 2 is (a , b , c), then 2 a + b + 2 c is equal to
A
54
B
50
C
–6
D
–42
Answer
–6
Explanation
Solution
The correct option is(A): -6
Mirror image of (2, 4, 7) in 3 x – y + 4 z = 2 is
(a, b, c) then
= –6