Just created this thread for people who will be sitting the MEI C1 (4751) exam on Wednesday 16th May.
I'm resitting after getting 78 UMS in the January exam; I'm quite optimistic this time round, but with the unpredictable nature of MEI who knows what monstrosities could find their way into the exam paper.
That being said, I have found that, on most papers, for a lot of the 'more difficult' questions (those towards the end of Section B) the key tends to lie with a quadratic equation.
Anyway, aiming for 100 UMS on this paper! I hope it goes well for everyone else too!
Any tips for how to succeed? In some mocks I am getting 100% or very close, in others a few questions throw me. they always seem to be thing like circle equations, or factor theorum. Can someone explain factor theorus to me please? I've tried going over it, but I don't seem to get the concept, perhaps some dicussion may aide me.
I'd also be happy to help anyone Or try my best anyways!
I hate the implication questions. In Jan I only got 1/4 marks in the ones that came up xD I also seemed to lose just one mark on a few questions so I am going to make sure I don't miss any steps that deserve marks in my calculations
I'd also be happy to help anyone Or try my best anyways!
I hate the implication questions. In Jan I only got 1/4 marks in the ones that came up xD I also seemed to lose just one mark on a few questions so I am going to make sure I don't miss any steps that deserve marks in my calculations
I don't mind the implication ones, it's the questions like: prove that n^2 + n is always even. I got it right, but i never know quite what they want to see--- do they want n(n+1) (which was right, plus a supporting statement), or implication symbols? or worked examples of different integers? non integers?
I don't mind the implication ones, it's the questions like: prove that n^2 + n is always even. I got it right, but i never know quite what they want to see--- do they want n(n+1) (which was right, plus a supporting statement), or implication symbols? or worked examples of different integers? non integers?
I usually do some examples but it all depends on the question. Usually implication ones leave you like a box to write them in I think
You will be fine! We all will on here unless we get a killer question (which won't happen )
I usually do some examples but it all depends on the question. Usually implication ones leave you like a box to write them in I think
Can you help me with factor or remainder theorum please? Its the only thing I haven't really learnt properly. I'm trying to teach myself now but we didn't go over it in class.
My question is from June 2010 paper, using factor theorum,
f(x)=x^3 + 6x^2 - x - 30. Using factor theorum find a root of f(x)=0 and factorise completely.
Now I can factorise completely, and by observation I can tell that x=2 is a root of this polynomial. This means the fully factorised version becomes f(x)=(x-2)(x+3)(x+5), but as this is all by observation, I am prettty certain I'd lose all the marks.
Can you help me with factor or remainder theorum please? Its the only thing I haven't really learnt properly. I'm trying to teach myself now but we didn't go over it in class.
My question is from June 2010 paper, using factor theorum,
f(x)=x^3 + 6x^2 - x - 30. Using factor theorum find a root of f(x)=0 and factorise completely.
Now I can factorise completely, and by observation I can tell that x=2 is a root of this polynomial. This means the fully factorised version becomes f(x)=(x-2)(x+3)(x+5), but as this is all by observation, I am prettty certain I'd lose all the marks.
How wuld you go about this?
I would go about it by testing certain numbers! I usually start with 1 or 2. So... f(2) = (2)^3 + 6(2)^2 - (2) - 30 = 8 + 24 - 32 = 0 Then I'd do polynomial division by x - 2 to find the other factors. (click to enlarge image)
I would go about it by testing certain numbers! I usually start with 1 or 2. So... f(2) = (2)^3 + 6(2)^2 - (2) - 30 = 8 + 24 - 32 = 0 Then I'd do polynomial division by x - 2 to find the other factors. (click to enlarge image)
(x - 2)(x^2 + 8x + 15) (x - 2)(x + 3)(x + 5)
That's how I'd do it
but isn't there a more rigid methos as opposed to trial and error. isn't that essentially just observation method, but with a few guesses first?