In 49-58, write out each sum. n-1 1L k+lk=o 3

1 Vectors Definition of a vector Three ordered numbers for exampA=(2,3,1) B=(4,8,5) ● it is important to note that two vectors are not equal if the pairs are ordered differently A=(2,3,1) anC=(3,2,1), thA is not equal tC. Usefulness of vectors 1. solve physics problems 2. locate points in space that could not otherwise be located CARTESIAN COORDINATES >OMP is a right angled triangle VECTOR OPERATIONS: 1) AdditionA=(a,b,c) aB=(d,e,f) A+B = (a+d, b+e , c+f ) 1 vectors are identified with bold italicized numbers in this note. 2) Multiplication: (with a scalar quantity a scalar quantity has no direc