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Level 2 Further Maths - Post some hard questions (Includes unofficial practice paper)

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Reply 100

Original post
by notnek

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Reply 101

Original post
by notnek
The best thing to use is your textbook if you have one. The problem with revision resources for a topic like this is that most revision resources will be A Level and go through methods that you don't need.

I'll probably post a full solution to this question a bit later and explain all the methods. This question is harder than any matrices question that's been in a Level 2 FM paper so try those questions first.


are thetha and alpha whole numbers?

Reply 102

Original post
by TheMightyBadger

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You should be getting whole numbers for theta and alpha. If you like I can check your working - I've got a feeling that you are close.

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Reply 103

Original post
by Pretish
are thetha and alpha whole numbers?

Yes.

Reply 104

Original post
by notnek
This is the hardest one I've posted so far and requires a very good undrstanding of transformation matrices. Don't worry if you can't do this one.


The transformation matrix \displaystyle \mathbf{P}^3 represents a clockwise rotation of 150^o about the origin.

\displaystyle \mathbf{Q} = \begin{pmatrix}0 & -1 \\ 1 & 0\end{pmatrix}

The unit vector \displaystyle \begin{pmatrix}0 \\ 1\end{pmatrix} is transformed by the matrix \displaystyle \mathbf{Q}\mathbf{P} to give the vector \displaystyle \begin{pmatrix}-\cos \theta \\ \cos \alpha \end{pmatrix}.

Find the value of \theta and \alpha.


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Reply 105

Can anyone help me out with this question ?- without using the trial and improvement method - thanks

The nth term of a sequence is n^2 + n
two consecutive terms in the sequence have a difference of 32
work out the two terms

Reply 106

Original post
by Blackjoker1506
So, in other words, it's today?

No, tomorrow is non-calculator. My birthday is on Sunday.

Reply 107

Original post
by notnek
You should be getting whole numbers for theta and alpha. If you like I can check your working - I've got a feeling that you are close.

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Reply 108

Original post
by psc---maths
is theta 50 and alpha 40

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Reply 109

Original post
by TheMightyBadger

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i got theta as being 50 and alpha as being 40

Reply 110

Original post
by notnek

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Reply 111

Original post
by noorah.dj
Can anyone help me out with this question ?- without using the trial and improvement method - thanks

The nth term of a sequence is n^2 + n
two consecutive terms in the sequence have a difference of 32
work out the two terms


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The way you do it is by setting up the equation
(n+1)^2+n+1-(n^2+n)=32 and solve it from there

Reply 112

Original post
by noorah.dj
Can anyone help me out with this question ?- without using the trial and improvement method - thanks

The nth term of a sequence is n^2 + n
two consecutive terms in the sequence have a difference of 32
work out the two terms


Consecutive just means next to each other, so n + 1

[(n+1)^2 + n + 1] - (n^2 + n) = 32

n^2 + 2n + 1 + n + 1 - n^2 - n =32

2n = 30
n = 15

Numbers are 15 and 16
(edited 8 years ago)

Reply 113

Original post
by Pretish

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Reply 114

Original post
by B0redBrioche

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The way you do it is by setting up the equation
(n+1)^2+n+1-(n^2+n)=32 and solve it from there


thank you , I get it now.

Reply 115

Original post
by c.lorenzoni
Consecutive just means next to each other, so n + 1

[(n+1)^2 + n + 1] - (n^2 + n) = 32

n^2 + 2n + 1 + n + 1 - n^2 - n =32

3n = 30
n = 10

Numbers are 10 and 11


I believe it is 2n not 3n so it should be 15 and 16

Reply 116

Original post
by notnek

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very rushed and basically no reasoning down, but should be understandable considering the right-angled triangle in the transformation P.

Reply 117

Original post
by notnek

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OOOH.

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Reply 118

Original post
by notnek
I don't think this is right. If you are trying to use methods outside Level 2 FM then this is the wrong approach.

Lots of hints for anyone strugging with the matrices question:

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lmao i didn't realise it was p cubed and rotated it 240 degrees.

Reply 119

Does anyone have anymore questions?

(possibly any tricky circle theorems)

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