JEE Advanced Model Paper 12 with solutions for online practice

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Question : 55 of 60

Marks: +1, -0

Let

−

a

,

−

b

,

−

c

be three vectors such that

−

a

≠ 0 and

−

a

×

−

b

= 2

−

a

×

−

c

, |

−

a

| = |

−

c

| = 1 , |

−

b

| = 4 and |

−

b

×

−

c

| = √15 . If

−

b

−2

−

c

= λ

−

a

then value of |λ| =

4
3
2
1

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