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ABCDEF si a regular hexagon with centre at the origin such that `A vec D + E vec B + F vec C = lambda E vec D . " Then, " lambda ` equals

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ABCDEF si a regular hexagon with centre at the origin such that `A vec D + E vec B + F vec C = lambda E vec D . " Then, " lambda ` equals
A. 2
B. 4
C. 6
D. 3
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Correct Answer - B
we have
` A vec D + E vec B + F vec C = 4 A vec B = 4 E vec D `
`therefore lambda =4`
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