Question Bank - Mathematics

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The position vectors of points P, Q R and S are a, b, (2a + 3b) and (a “ 2b) respectively. Which of the following is the position vector of SQ?

A.
?3b “ 2a
B.
2a “ 3b
C.
?3b “ a
D.
a “ 3b

Solution:

Given: The position vectors of points P, Q, R, and S are a, b, (2a + 3b), and (a “ 2b).Calculation:OP = a, OQ = b, OR = (2a + 3b), OS = (a - 2b)Now, SQ = (b - (a - 2b)? (b - a + 3b) = (3b - a)

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