# Have you practised your Vectors?

Geometry Level 3

If $$\vec A$$ and $$\vec B$$ are two vectors such that $$\vec A + \vec B$$ is perpendicular to $$\vec B$$ and $$\vec A+2\vec B$$ is perpendicular to $$\vec A$$, which of the following is correct?

Clarification: The vectors $$\vec A$$ and $$\vec B$$ are both non-zero.

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