Q.
In a trapezium, vector BC→=αAD→. We will then find that p→=AC→+BD→ is collinear with AD→. If p→=μAD→ then which of the following is true?
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a
μ=α+2
b
μ+α=1
c
α=μ+1
d
μ=α+1
answer is D.
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Detailed Solution
c→−b→=αd→ and p→=AC→+BD→=μAD→ Hence, p→=c→+d→−b→=μd→ (using c→−b→=αd→)or μ=α+1
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