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1. |
If x2 + 3y2 + 4z2 + 19 = \(4\sqrt 3 (x + y + z)\), then the value of (x - y + 4z) is: |
A. | \(\frac{{4\sqrt 3 }}{3}\) |
B. | \(\frac{{7\sqrt 3 }}{2}\) |
C. | \(\frac{{10\sqrt 3 }}{3}\) |
D. | \(4\sqrt 3 \) |
Answer» D. \(4\sqrt 3 \) | |