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$If A^{3} = 0, then I + A + A^{2} equals$

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I−A

I+A1−1

I−A−1

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Correct option is C

Given A3=0 Now, (I−A)I+A+A2=I2+IA+IA2−AI−A2−A3=I−A3=I⇒(I−A)−1=I+A+A2

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If A3=0, then I+A+A2 equals

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$If A^{3} = 0, then I + A + A^{2} equals$