Question 14
VectorsIf r = i + 2j and n = −i + 3j, find |2n − r|.
- A.8.5
- B.5.0
- C.4.0
- D.3.6
Show the answer and explanation
Answer: B (5.0)
Explanation
2n − r = (−2 − 1)i + (6 − 2)j = −3i + 4j, and |−3i + 4j| = √(9 + 16) = 5.0.
If r = i + 2j and n = −i + 3j, find |2n − r|.
Answer: B (5.0)
2n − r = (−2 − 1)i + (6 − 2)j = −3i + 4j, and |−3i + 4j| = √(9 + 16) = 5.0.