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English grammar question.
Consider a set of 12 equal charges (+q each), arranged to form two concentric regular hexagons in...
... the XY-plane, centred at origin. The edges of the two hexagons have lengths a and 2a respectively. They are arranged in such a way that two ...
... equation? y + 2 = 1/2(x - 2) y + 2 = -1/2(x + 2) y - 2 = -1/2(x - 2) y + 2 = -1/2(x - 2)
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