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Mathematics, 23.02.2021 23:00 Bryoh

Determine whether the given vectors are orthogonal, parallel, or neither. 1) a= 8, 7, -2 ; b= 7, -1, 7
2) a= -6i+9j+3k ; b= 4i-6j-2k
3) a= 3i-j+3k ; b=3i+3j-2k
4) a= -9,5,5 ; b=9,-6,1
5) a=6,6 ; b=-3,3

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