SOLUTION: Find the dot and cross product of the following vectors: a= 2i + 3j - k b= i + 2j - k Note: They have the -> sign above all of them. I just dont know how :( Hope you co

Algebra ->  Exponential-and-logarithmic-functions -> SOLUTION: Find the dot and cross product of the following vectors: a= 2i + 3j - k b= i + 2j - k Note: They have the -> sign above all of them. I just dont know how :( Hope you co      Log On


   

Question 352124: Find the dot and cross product of the following vectors:
a= 2i + 3j - k
b= i + 2j - k

Note: They have the -> sign above all of them. I just dont know how :( Hope you could answer this. Thank you so much
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
a=(2,3,-1)
b=(1,2,-1)
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Dot product: Output is a scalar (a number)
a*b=(a1,a2,a3)*(b1,b2,b3)=
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Cross product: Output is a vector.
a+x+b=%28matrix%283%2C3%2Ci%2Cj%2Ck%2Ca1%2Ca2%2Ca3%2Cb1%2Cb2%2Cb3%29%29
a+x+b=(a%5B2%5Db%5B3%5D-a%5B3%5Db%5B2%5D,a%5B1%5Db%5B3%5D-a%5B3%5Db%5B1%5D,a%5B1%5Db%5B2%5D-a%5B2%5Db%5B1%5D)
a+x+b=(3%28-1%29-%28-1%29%282%29,2%28-1%29-%28-1%29%281%29,2%282%29-3%281%29)
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Get out a calculator or pencil and paper and complete both calculations to get the final answer.