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If A is any symmetric 2 2 matrix, then there must exist a

Chapter 5, Problem 46

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QUESTION:

If A is any symmetric 2 2 matrix, then there must exist a real number x such that matrix A x I2 fails to be invertible.

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QUESTION:

If A is any symmetric 2 2 matrix, then there must exist a real number x such that matrix A x I2 fails to be invertible.

ANSWER:

Step 1 of 3

We have to check

If  is any symmetric  matrix, then there must exist a real number  such that matrix  fails to be invertible.

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