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If the point with position vectors k ˆ 13 j ˆ 10 i ˆ + + α , k ˆ 11 j ˆ 11 i ˆ 6 + + , k ˆ 8 j ˆ i ˆ 2 9 − β + are collinear, then (19 α – 6 β ) 2 is equal to

1. 36
2. 25
3. 49
4. 16

Correct answer: 36

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