If the vector 2ˆi3ˆj8kˆ is perpendicular to vector 4ˆi4ˆjnkˆ , then the value of n is (a) ½ (b) -1/2 (c) 1 (d) -1
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Answer:
B
Explanation:
2×4+3×4+8×n=0
8+12+8n=0
-16=8n
n=-1/2
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