Unofficial Marking Scheme - Higher Maths 2018-19

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Reply 20

Erin4589

Has anyone got the actual question paper

Reply 21

BookFanatic

Original post by Erin4589

Has anyone got the actual question paper

No unfortunately, gave it to my maths teacher

Reply 22

hazellowe

Original post by BookFanatic

This will be a horrible explanation but essentially this is not assumed.

This links back to Nat 5 where you got those right angled triangles in circles. The tangent creates this right angle with the centre point of the angle, so naturally the centre point of the circle and (0,-2) create the diameter.

In any case, the distance between those two points is longer than that of the other two

Of course....but horrid question

Reply 23

Pearls1

Does anyone remember how many marks each question was worth?

Reply 24

BookFanatic

Original post by hazellowe

Of course....but horrid question

Yes took me a while to figure out which points to use, I originally used the wrong ones but ended up with a totally convoluted answer so figured it had to be the other point, that was just confirmed when I compared the distances from the two answers.

I had to get my friend to explain to me how she knew which points to use after, usually I just assume based of the scaling of the drawing 😅

Reply 25

Labrador99

Volunteer Team

Original post by Erin4589

Has anyone got the actual question paper

Original post by Pearls1

Does anyone remember how many marks each question was worth?

Question paper is here :smile:

https://www.thestudentroom.co.uk/showthread.php?t=5581156&page=5#post82972594

Reply 26

nat5dawg

Hi all, here's what I did for Q8.

Reply 27

Jack_25

Original post by BookFanatic

For paper 2 question 10b, you might have to prove you can’t further factorise the third bracket by substituting the coefficients into the discriminant.

I think for paper 2Question 10 (b), you can actually factorise further into a 4 sets of bracket answer. I found a second factor (x-1) but then I successfully factorised what was in the third bracket into two further brackets. So you get something like but not exactly (x+3)(x-1)(3x - a)(x+b) --- i can't remember the 2 values I got for a and b, I don't think discriminant had anything to do with this question, but I could be wrong.

Reply 28

536458

Original post by Erin4589

Has anyone got the actual question paper

Yep, here! :smile:

Had to break it up into two posts, so half of it might be on the previous page.

(edited 4 years ago)

Reply 29

536458

Original post by WestDragon

Be sure to post any corrections or additional answers if necessary.

Pictures will be posted shortly after this post.

In previous years, the marking scheme has said candidates have to mention that "the recurrence relation is linear" as well as "-1<a<1" when talking about limits... not sure if that's the case this year, but thought I'd say.

Reply 30

username3779536

Original post by 536458

Yeah, definitely worth mentioning, noticed that a couple days ago, though some schemes seem to be missing it.

Reply 31

Joviality

Asked my lecturer about this - doesn't matter if you mention it or not as all RR will be linear at this level.

Original post by WestDragon

Yeah, definitely worth mentioning, noticed that a couple days ago, though some schemes seem to be missing it.

Reply 32

Bradleyyy123

For question 15 bii you don’t use CT you use PT ( can’t explain why well ) but I suggest you look over your answer basically there’s a right angled triangle inside the circle that you have to draw and the right angle is at C and from national 5 you should know that a triangle inside a circle is equal to the circles diameter

Original post by WestDragon

Be sure to post any corrections or additional answers if necessary.

Pictures will be posted shortly after this post.

Reply 33

CossLne

My solutions are posted in the discussion thread:

https://www.thestudentroom.co.uk/showthread.php?p=82981600#post82981600

Reply 34

ACFJ

For the polynomials question I literally wrote “impossible to factorise?” next to the quadratic at the end
I hope I get the marks for it

Reply 35

536458

Original post by ACFJ

For the polynomials question I literally wrote “impossible to factorise?” next to the quadratic at the end
I hope I get the marks for it

Seems like a valid explanation to me, but I'm not an expert :wink:

Reply 36

ACFJ

Yea I’m wondering if you’d have to prove it using the discriminant to get the mark. I hope that’s not the case, but who knows.

Reply 37

Jack_25

Original post by ACFJ

Yea I’m wondering if you’d have to prove it using the discriminant to get the mark. I hope that’s not the case, but who knows.

As I said above, I did something weird and managed to factorise it through, 🤔, I got 4 brackets tho, I feel I’ve done something wrong but yeah if it is wanting 5 marks worth, I fear mentioning it will not be sufficient, I think the b^2 - 4ac working was worth 2-3 marks.

Reply 38

Student8472

It goes back to that old N5 fact that we learned about the angles between the two corners of a semicircle and a point lying on the semicircle being 90°. Since the tangent to the first circle is 90° (because it is a tangent) we can then assume that the line between the y-intercept and the centre of the first circle is a diameter (ie the two corners of a semicircle) and the point the tangent touches the circle is a point lying on this semicircle.

Reply 39

Student8472

I'm convinced you would, because otherwise it's entirely possible one might have just not realised there were more solutions. "There aren't any more solsoluti because I can't find any" probably isn't the proof they were looking for at Higher.

Original post by ACFJ

Yea I’m wondering if you’d have to prove it using the discriminant to get the mark. I hope that’s not the case, but who knows.