SOLUTION: Find b so that the vectors v = i + j and w = i + bj are orthogonal

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Question 160619: Find b so that the vectors v = i + j and w = i + bj are orthogonal
Answer by nabla(475) About Me  (Show Source):
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For v and w to be orthogonal, their dot product must be 0.
(1,1)*(1,b)=1+b=0
b=-1