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If the vectors ⎯→ AB = 3 i ˆ + 4 k ˆ and ⎯→ AC = 5 i ˆ – 2 j ˆ + 4 k ˆ are the sides of a triangle ABC, then the length of the median through A is -

1. 33
2. 45
3. 18
4. 72

Correct answer: 33

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