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Question

Let α=(λ2)a+b and β=(4λ2)a+3b be two given vectors where vectors a and b are non-collinear. The value of λ for which vectors α and β are collinear, is:

A
3
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B
3
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C
4
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D
4
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Solution

The correct option is D 4
α=(λ2)a+b
β=(4λ2)a+3b
As per question, α and β are collinear
(λ2)1(4λ2)3=0
3λ64λ+2=0
λ=4

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