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# original source of a question watch

1. does anyone know the original source of these question: The points P,Q and R have the co-ordinates (-2,6), (5,7) and (2,-2) respectively. a)

Any information would be greatly appreciated.
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2. The perpendicular bisector is defined here (by BBC Bitresize): http://www.bbc.co.uk/schools/gcsebit...locirev2.shtml .

You need to find the equation of the perpendicular bisector of line PQ.

One way is you need (at least):
- A point that the perpendicular bisector goes through, can you find that point?
-The gradient of the perpendicular bisector, can you link that gradient with the gradient of line PQ?

Then can you build the equation of the perpendicular bisector?
3. I know how to solve the questions but I want to know the original source of the questions. I'm currently doing a level aqa maths if that helps.
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4. (Original post by trebor00)
I know how to solve the questions but I want to know the original source of the questions. I'm currently doing a level aqa maths if that helps.
Sorry, I apologise, teaches me to read more carefully.

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