Q. If x3 + y3 + z3 = 3(1 + xyz), P = y + z – x, Q = z + x – y and R = x + y – z, then what is the value of P3 + Q3 + R3 – 3PQR?
A) 8
B) 9
C) 6
D) 12
✔ Correct Answer: 12
Exam Insight
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A) 8
B) 9
C) 6
D) 12
✔ Correct Answer: 12
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