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Can ny1 plz solve Q6 jan 2009 M1...thnku

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zshan:
Can ny1 plz solve Q6 jan 2009 M1?

YU-GI-OH!:
Since R is parallel to (i-2j) that means that R has values in the same ratio as (i-2j) i.e R is X(i-2j) where X is a number.
So first draw a triangle. I've attached the solution below. Hope it helps :)

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