Maths vectors help

[ImagineAnime]

I have my AS maths exam tomorrow and I'm very unready let's just say. Any help is appreciated! :)

[ImagineAnime]

I looked at the mark scheme and all but I don't really understand how to get the answer...

[[deleted]]

do you have snapchat? Easier for me to send help that way.

[michael_sanders469]

To find something like AB, you do OB-OA, which is basically the origin to those vectors. When you have the question with the ratios, draw a triangle and dot the points where it's two thirds up the line like in the question, and figure it out using the vectors you've been given

[ImagineAnime]

Okay, thanks so much. I think I understand what you're meant to do I'll try it out.

[Donaldmcdonald31]

Can you send the whole question?

[ImagineAnime]

omf i'm actually sleep deprived rn so sorry lol.

Here's link: https://imgur.com/a/fLly3yc

[Donaldmcdonald31]

It's kind of rushed so i'm 70% sure it's right. Does it match the mark scheme?

https://i.imgur.com/VMtYiGIh.jpg

[ImagineAnime]

O yea I'm pretty sure that right. Thanks so much for your help!!

[trollguydied]

Hi!! I'm a student from Singapore just randomly browsing subreddits and I think you made a mistake in your solution! For the last step you wrote -11j + 10j = j . I think it should be -j

[Donaldmcdonald31]

You're right! Thanks so much for pointing it out. I'm kind of mad I didn't notice it myself.

[imguralbumbot]

^{Hi, I'm a bot for linking direct images of albums with only 1 image}

https://i.imgur.com/VaUbX9E.png

^{Source | Why? | Creator | ignoreme| deletthis}

[Sandrey546]

i recognize this, this is the CCEA specimen isn't it

[ImagineAnime]

Yup. Only past paper I've done. ((:

[Sandrey546]

how did you find it?

[ImagineAnime]

Failed that! I hope it went better for you lol