C4 Vectors

Hi all,

I am currently leaning about vectors in C4, and have gained a reasonable understanding of them. However, question 8 in the Edexcel Student Book I am struggling with.

I have attached photographs of the question and the diagram drawn out with the added information about the vectors.

In part b of the question it asks for the vector OF. I am stuck because there is no vector a,b, c etc... for the line AB, just a ratio. I can see no vector to relate this line to. For example vector OE is 1/3a and that is easy because I have vector 'a' to work with.

Can someone help please?

(edited 8 years ago)

Original post by Tygra

Hi all,

I am currently leaning about vectors in C4, and have gained a reasonable understanding of them. However, question 8 in the Edexcel Student Book I am struggling with.

I have attached photographs of the question and the diagram drawn out with the added information about the vectors.

In part b of the question it asks for the vector OF. I am stuck because there is no vector a,b, c etc... for the line AB, just a ratio. I can see no vector to relate this line to. For example vector OE is 1/3a and that is easy because I have vector 'a' to work with.

Can someone help please?

Think about one of the ratios you're given in the question, and how you can use it.

Reply 2

B_9710

18

Original post by Tygra

Hi all,

I am currently leaning about vectors in C4, and have gained a reasonable understanding of them. However, question 8 in the Edexcel Student Book I am struggling with.

I have attached photographs of the question and the diagram drawn out with the added information about the vectors.

In part b of the question it asks for the vector OF. I am stuck because there is no vector a,b, c etc... for the line AB, just a ratio. I can see no vector to relate this line to. For example vector OE is 1/3a and that is easy because I have vector 'a' to work with.

Can someone help please?