Let →α=(λ−2)→a+→b and →β=(4λ−2)→a+3→b 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=(λ−2)→a+→b →β=(4λ−2)→a+3→b As per question, →α and →β are collinear ∴∣∣∣(λ−2)1(4λ−2)3∣∣∣=0 ⇒3λ−6−4λ+2=0 ⇒λ=−4