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45 votes
45 votes
What is the dot product? U=-5,5,-5 v=6,5,-7

User Ritmatter
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1 Answer

9 votes
9 votes

\begin{gathered} u=<-5,5,-5> \\ v=<6,5,-7> \end{gathered}

The dot product is given by:


u\cdot v=u_1v_1+u_2v_2+\cdots+u_nv_n_{}

therefore:


\begin{gathered} u\cdot v=(-5\cdot6)+(5\cdot5)+(-5\cdot-7) \\ u\cdot v=-30+25+35 \\ u\cdot v=30 \end{gathered}

User Parisa
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2.5k points