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GUJCET · Maths · Matrices

જો \(A^2=A\) થાય તેવો ચોરસ શ્રેણિક A, તો \(( I - A )^3-( I + A )^2=\) ____________

  1. A \(I-A\)
  2. B \(2(I-A)\)
  3. C I
  4. D \(-4A\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(-4A\)

Step-by-step Solution

Detailed explanation

\( ( I - A )^3 = I - 3A + 3A^2 - A^3 \) \( = I - 3A + 3A - A = I - A \) (since \( A^2=A, A^3=A \))
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