1.

The value of x for which the matrix \({\rm{\Delta }} = \left[ {\begin{array}{*{20}{c}} {x + \lambda }&x&x\\ x&{x + \lambda }&x\\ x&x&{x + \lambda } \end{array}} \right]\)is singular is

A. x = -3λ
B. x = -(λ/3)
C. x = -(λ)
D. x = 0
Answer» C. x = -(λ)


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