SamverkanFlervariabelanalysLIU

a) \displaystyle (-7,-12,13)

b) \displaystyle -9

c) \displaystyle |\boldsymbol{u}|=\sqrt{14}, \displaystyle |\boldsymbol{v}|=\sqrt{25}

d) \displaystyle \theta =\arccos \left( \frac{-9}{\sqrt{14}\sqrt{25}} \right )