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OpenStudy (4meisu):
Help with vectors please! BB' and CC' are medians in the triangle ABC (B'∈AC and C'∈AB). Let AB=u and AC=v Show that BB'=-u+(1/2)v and CC'=-v+(1/2)u
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OpenStudy (phi):
Here is a picture |dw:1459169849018:dw|
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