IIT JAM
Harshal Asked a Question
July 22, 2020 9:15 ampts 30 pts
  • IIT JAM
  • Mathematics (MA)

Is 2. if o is the cube root of unity, then the invers of a =|1 1 1 1 1 1 1 1 1 1 1 1 (a) (b) 2 1 1 1 1 1 1 1 1 1 4 (c) (d) 1 3 1

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  • Piyush Best Answer
    PFA. Go with discarding the options, as if you multiply A with any option ,only( 4) gives 1 as first element.
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  • Deepak singh
    discarding the option is best idea to solve this .. only option d satisfies A.A^-1= I ..
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  • Deepak singh
    kindly accept my answer by clicking thank you , if no doubt.
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