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MEI C4 question help please!

c4.png

Could some please help me with part ii. I have worked out the vector equation but I have no idea of how to do the next bit
Original post by nju
c4.png

Could some please help me with part ii. I have worked out the vector equation but I have no idea of how to do the next bit


The vector equation of the line BD maps any point on the line BD. You have the position vector of B and you know that D is 15 units away from B. Put your direction vector in unit vector form and the multiple of the direction vector which maps B onto D is 15 :smile:

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