#### Answer

1

#### Work Step by Step

The dot product of a= 2i + j and b= i - j + k is :
<2,1,0> dotted with <1,-1,1> = (2×1) + (1×-1) + (0×0)= 1

Published by
Cengage

ISBN 10:
1285740629

ISBN 13:
978-1-28574-062-1

1

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