If x3 + y3 + z3 = 3(1 + xyz), P = y + z – x, Q = z + x – y and R = – McqOptions

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1.	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.	9
B.	8
C.	12
D.	6
Answer» D. 6

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