Vectors and matrices — Question 4
QCAA 2020, Paper 1 · 1 mark
Q4 · 2020 · Technology-freeSimple familiar1 mark
QUESTION 4
Consider points A and B as shown.
The position vector representing the midpoint of AB is 
(A)58.510 (B)5108.5 (C)108.55 (D)1058.5 WORKED SOLUTION
Answer A
1 markWorked solution
From the diagram, A=(0,5,20) and B=(10,12,0). Their midpoint is 21(A+B)=(5,8.5,10). Worked explanation by QCE Vault; correct option verified against the QCAA answer key.
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