(Quiz) : AIEEE 2008 EXAMINATION PAPER Q&A Online Test

76. Let a, b, c be any real numbers. Suppose that there are real numbers x, y, z not all zero such that
x = cy + bz, y = az + cx, and z = bx + ay. Then a2 + b2 + c2 + 2abc is equal to
(1) –1 (2) 0
(3) 1 (4) 2
Ans. [3]

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