MATH1002 Lecture Notes - Lecture 3: Unit Vector
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15 Jun 2018
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MAT( – Week Lecture
1.4 – Vector Length
• The length of v = [v1,v2,v3,…,vn] is |v|
• A vector of length 1 is called a unit vector
Notation
• For 1 ≤ i ≤ , we denote by ei the vector in ℝn whose ith
component is 1 and with all other components 0
2 – Dot Products and Projections
2.1 – The Dot Product
• The dot product of vectors is the scalar of multiplying each of the components of the
vectors together and then adding it all together
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