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# Pure Maths Position vectors watch

1. Given that point A has the position vector 4i + 7j and point B has the position vector 10i + qj, where q is a constant, find
(a) the vector AB in terms of q.
(b) Given further that AB = 2 (square root) 13 , find the two possible values of q showing detailed reasoning in your working.
2. (Original post by Ljm2001)
Given that point A has the position vector 4i + 7j and point B has the position vector 10i + qj, where q is a constant, find
(a) the vector AB in terms of q.
(b) Given further that AB = 2 (square root) 13 , find the two possible values of q showing detailed reasoning in your working.
For part a, it's effectively b-a
From there, you can equate your equation to the value given and should probably get a quadratic to solve.
3. remember to put a squiggle under the i and j

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