Fundamentholfundamenthol
JEE Advanced2022Paper 2MATH-III
Q.

If , then which of the following matrices is equal to ?

  1. A

  2. B

  3. C

  4. D

Solution

Write , where . Note that has rank 1 with (since the trace of is zero and its determinant is zero, so is nilpotent).

Verifying: .

By the binomial expansion, .

For : .

The answer is option (A).

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