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If A is a square matrix …

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If A is a square matrix such that A^2=A show that (I+A)^3=7A+I
  • 1 answers

Dolly ?️ 6 years, 4 months ago

I^3+A^3+3.l^2.A+3.I.A^2 I+A^2.A+3A+3A^2 ('.' A^2=A ) I+A.A+3A +3A & I+A+6A ( A^3=A^2) 1+7A
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