

MCQOPTIONS
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1. |
If â, b̂ and ĉ are unit vectors and |â + b̂|2 = |b̂ + ĉ|2 = |ĉ + â|2 = 8, then |2â + b̂ + ĉ| is equal to |
A. | 2 |
B. | 4 |
C. | 6 |
D. | none of the above |
Answer» D. none of the above | |