If A = α 2 5 5 - α and det A 10 = 1024 , then α =

If A=α255-α and detA10=1024, then α=
  1. -2
  2. -1
  3. -3
  4. 0

Solution

A=α255-α

A=-α3-25

Now A10=A10=210

⇒A=2

i.e. -α3-25=2⇒α=-3

Asked in: AP EAMCET 2022 (04 Jul Shift 1)

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