I thought the edexcel FP1 book teaches Alpha and Beta way to work out the quadratic equation when given two complex roots?Or are you guys talking about something else

Yeah I just did a IAL fp1 paper and the alpha and beta questions are a bit different, still possible to do but harder

Reply 143

tiny hobbit

15

Original post by GarlicBread01

Yeah I just did a IAL fp1 paper and the alpha and beta questions are a bit different, still possible to do but harder

and won't be on the ordinary FP1 papers.

Reply 144

Glavien

11

Can I do part b of this question by comparing coefficients? When trying it by comparing coefficients I get different values for the root? Its from the FP1 specimen paper btw.

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Reply 145

Zacken

22

Original post by Glavien

Can I do part b of this question by comparing coefficients? When trying it by comparing coefficients I get different values for the root? Its from the FP1 specimen paper btw.

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Because what you've written isn't true, the coefficient of x^2 on the LHS is 2 and the coefficient of the RHS is 1. So you need to multiply the entirety of the RHS by 2.

Reply 146

Imperion

17

Original post by tiny hobbit

So make sure that you work through the R papers (and the appropriate questions on the IAL papers).

Um... so... what are R papers? I am so confused :lol:

Reply 147

Zacken

22

Original post by Imperion

Um... so... what are R papers? I am so confused :lol:

"Regional" papers, they have since been replaced by IAL but they were the papers sat by international (non-UK) candidates.

Reply 148

Glavien

11

Original post by Zacken

Because what you've written isn't true, the coefficient of x^2 on the LHS is 2 and the coefficient of the RHS is 1. So you need to multiply the entirety of the RHS by 2.

Ohh, thanks.

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Reply 149

Imperion

17

Original post by Zacken

"Regional" papers, they have since been replaced by IAL but they were the papers sat by international (non-UK) candidates.

Ohhhhhhhhhhhh :redface:

Reply 150

Zacken

22

Original post by Glavien

Ohh, thanks.

Original post by Imperion

Ohhhhhhhhhhhh :redface:

Reply 151

LelouchViRuge

OP

7

How's is everyone's revision going for this module?

There is just under a month left for the big exam ...

Reply 152

NotNotBatman

20

Original post by LelouchViRuge

How's is everyone's revision going for this module?

There is just under a month left for the big exam ...

Good, just need to work on Matrix equations where numerical methods are not allowed and tricky coordinate system questions.

Reply 153

NotNotBatman

20

Part (a) was done with ease, but how do I do part (b), so far I've got;

x = 6r , y = \frac{6}{r}

\therefore\frac{dy}{dx} =-\frac{6}{r^2}\cdot\frac{1}{6}

= -\frac{1}{r^2}

\therefore m_n = r^2

I think I have to show somehow that the gradient is the same, so

r^2 = -\frac{1}{pq}

Have I done it right and where do I go from here?

(edited 8 years ago)

Reply 154

Zacken

22

Original post by NotNotBatman

...

What is the gradient of PR? What is the gradient of QR? What equation can you form linking these two gradients together from the information in the question?

Then what is the gradient of the normal to H at R, blah blah, you'll figure it out once you do the above.

Reply 155

iMacJack

16

Original post by NotNotBatman

Part (a) was done with ease, but how do I do part (b), so far I've got;

x = 6r , y = \frac{6}{r}

\therefore\frac{dy}{dx} =-\frac{6}{r^2}\cdot\frac{1}{6}

= -\frac{1}{r^2}

\therefore m_n = r^2

I think I have to show somehow that the gradient is the same, so

r^2 = -\frac{1}{pq}

Have I done it right and where do I go from here?

Hey! What paper is this in?? Thanks :smile:

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Reply 156

NotNotBatman

20

Original post by iMacJack

Hey! What paper is this in?? Thanks :smile:

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IAL F1 June 2015. :smile:

Reply 157

iMacJack

16

Original post by NotNotBatman

IAL F1 June 2015. :smile:

Awesome man - cheers

How ya feeling about FP1?

Reply 158

NotNotBatman

20

Original post by iMacJack

Awesome man - cheers

How ya feeling about FP1?

Confident for the A, but still need more work for 100 UMS. My teacher is going to give my class the 2015 paper as a mock, so I won't look at it and use it as an indicator for what UMS I will achieve.

How are you feeling about this exam?

Reply 159

iMacJack

16

Original post by NotNotBatman

Confident for the A, but still need more work for 100 UMS. My teacher is going to give my class the 2015 paper as a mock, so I won't look at it and use it as an indicator for what UMS I will achieve.

How are you feeling about this exam?

Same as you! I definitely need to put in work into proof by induction & matrix algebra (going to do the mixed exercises and stuff)

Yeah the 2015 paper was good! Good luck on it

Edexcel FP1 Thread - 20th May, 2016

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