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How i can fix it? 1. For vilka a och b ar vektorerna u = (a, 5, b) och v = (2, -2, 0) ortogo-

How i can fix it?

1. For vilka a och b ar vektorerna u = (a, 5, b) och v = (2, -2, 0) ortogo- nala? 2. Bestam vinkeln mellan vektorerna u = (-1, 3, 2) och v = (2, 1, 5) (ut- tryckt med arccos)

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