You are Here: Home >< Maths

# FP3 Maths OCR Question (Vectors)

Announcements Posted on
Would YOU be put off a uni with a high crime rate? First 50 to have their say get a £5 Amazon voucher! 27-10-2016
1. On the June 2010 FP3 OCR Past paper, On question 7 part iii it states to use k as being 4, but allows k as being 4 root 21, which is what I used. The final part uses k = 4, and was wandering if anybody could explain why? Thank you.
2. (Original post by sarahemilyglass)
On the June 2010 FP3 OCR Past paper, On question 7 part iii it states to use k as being 4, but allows k as being 4 root 21, which is what I used. The final part uses k = 4, and was wandering if anybody could explain why? Thank you.
The perpendicular to the plane through (-7, -3, 0) meets the plane at

So you need to double that, not double the distance.
3. (Original post by Zacken)
The perpendicular to the plane through (-7, -3, 0) meets the plane at

So you need to double that, not double the distance.
Ahh I understand thank you! Spent all day learning/revising vectors so think I reached my limit for the day haha
4. (Original post by sarahemilyglass)
Ahh I understand thank you! Spent all day learning/revising vectors so think I reached my limit for the day haha
Awesome! No problem, hope it was a productive day.

## Register

Thanks for posting! You just need to create an account in order to submit the post
1. this can't be left blank
2. this can't be left blank
3. this can't be left blank

6 characters or longer with both numbers and letters is safer

4. this can't be left empty
1. Oops, you need to agree to our Ts&Cs to register

Updated: March 29, 2016
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Today on TSR

Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read here first

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams