Mathematics · Matrices and System of Linear Equations
Let A, B and C be three 2 × 2 matrices with real entries such that B = (I + A)-1 and A + C = I. If BC = 2-314 and CB x1x2 = 7-5, then find the value of x1 + x2.
- 1-511
- 2-111
- 3-211
- 4-411✓
Correct answer
-411
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