Further MathematicsVectorsWAEC
The vectors a = 2i + kj and b = 3i − 6j are perpendicular. Find k.
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Answer: B. 1
a · b = 6 − 6k = 0, so k = 1.
An AdmitMe practice question, written for the WAEC syllabus. Not an official past question.
Further Mathematics · Vectors
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