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If (vec(A) + vec(B)) is perpendicular to...

If `(vec(A) + vec(B))` is perpendicular to `vec(B) and (vec(A) + 2 vec(B))` is perpendicular to `vec(A)`, then

A

`A = sqrt2B`

B

A = 2B

C

2A = B

D

A = B

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The correct Answer is:
A
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