Question
Mathematics Question on Continuity and differentiability
If A=(3x−12x+3x+2) is a symmetric matrix, then the value of x is
A
(A) 4
B
(B) 3
C
(C) -4
D
(D) -3
Answer
(C) -4
Explanation
Solution
Explanation:
A=AT(3x−12x+3x+2)=(32x+3x−1x+2)⇒x−1=2x+3 or x=−4