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Vector confirmation Edexcel

Do we need to know bisecting vectors 3D/2D:
"2D/3D vectors where you prove to lines intersect and the lines are diagonal "

https://www.youtube.com/watch?v=BQpAUOchYdk
On this video, where someone asked this question TLmaths commented you only need to know for Further maths.

I was hoping someone can confirm for me.

Thanks.

Reply 1

T!gger34

https://qualifications.pearson.com/content/dam/pdf/A%20Level/Mathematics/2017/specification-and-sample-assesment/a-level-l3-mathematics-specification.pdf

Page 31, or thereabout