Flerdim
Moderatorer: Vektormannen, espen180, Aleks855, Solar Plexsus, Gustav, Nebuchadnezzar, Janhaa
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Wilco
In what directions at the point (a.b.c) does the function f(x,y,z) = x[sup]2[/sup]+Y[sup]2[/sup]-Z[sup]2[/sup] increase at half of its maximal rate at that point?