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If b a ) 2 ( G G G + − λ = α and b 3 a ) 2 4 ( G G G + − λ = β be two given vectors where vectors a G and b G are non-collinear. The value of λ for which vectors α G and β G are collinear, is -

1. 4
2. 3
3. –3
4. –4

Correct answer: –4

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