CGPET 2015 Solved Paper

Section: Mathematics

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Question : 117 of 150

Marks: +1, -0

If a=‌

∧

i

−2

∧

j

√5

and b=‌2

∧

i

+

∧

j

+3

∧

k

√14

are vectors in space, then the value of (2a+b)⋅[(a×b)×(a−2b)] is

0
1
5
4

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