Answer: 6i - 3j.
- A 6i - 3j
- B 6i + 3j
- C 2i - 3j
- D 5i - 4j
Correct answer: A. 6i - 3j
Explanation: Multiply each component by the scalar: 3(2i - j) = 6i - 3j.
Triangle law of vector addition: placing vector b at the head of vector a, the diagonal from the start to the final head gives the resultant a + b.
Concept context
Vectors, dot product, cross product, and geometric applications