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Mathematics 7 Online
OpenStudy (artemisxrpg):

Find a so that the verctors v = i -aj and w = 2i+3j are orthgonal.

OpenStudy (anonymous):

use dot product v.w=0 i.e 2-3a=0 or a=2/3

OpenStudy (artemisxrpg):

Oh, I thought it was a bit more complicated than that.

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