1.

If x1.x2.x3 = 4(4 + x1 + x2 + x3), then what is the value of [1/(2 + x1)] + [1/(2 + x2)] + [1/(2 + x3)]?

A. 1
B. 1/2
C. 2
D. 1/3
Answer» C. 2


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