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If x = 2+ sqrt3, y = 2- sqrt3 and z = 1,...

If `x = 2+ sqrt3, y = 2- sqrt3` and z = 1, then what is the value of `(x//yz) + (y//xz) + (z//xy) + 2[(1//x)+ (1//y) + (1//z)]`?

A

a) 25

B

b) 22

C

c) 17

D

d) 43

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