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Edexcel FP1 Thread - 20th May, 2016 watch

1. (Original post by TheRandomGenius)
How would you do part c? I have done parts a and b but can't seem to find the area - the co-ordinates of Q are (27,-18)
SKETCH! It'll be obvious once you do.
2. I have But still can't get the right answer (225)

Any help? The MA on physics and maths tutor doesn't make much sense.

(Original post by Zacken)
SKETCH! It'll be obvious once you do.
3. (Original post by Zacken)
Not sure what the problem is... split it up, sum the parts and get an equation:

k sum 2^r = number

remember geometric series...
Yep - silly me.
Cheers
4. Guys i have no idea what is going on here. THis is from the Jan 2016 IAL paper, do we need to know this as i dont know what to do. I got part (a) (i) but not the rest. Please help!!!!

The quadratic equationx2 – 2x + 3 = 0 has roots Į and ȕ.Without solving the equation, (a) (i) write down the value of (Į + ȕ) and the value of Įȕ (ii) show that Į2 + ȕ2 (iii) find the value of Į3 (b) (i) show that Į4 + ȕ4 (ii) find a quadratic equation which has roots = –2 + ȕ3 = (Į2 + ȕ2)2 – 2(Į ȕ)2 (5) – ȕ) and ( ȕ3(Į3 – Į) giving your answer in the form px2 + qx + r = 0 where p, q and r are integers.
5. I'm a sIow writer, how Iong shouId I spend on my induction questions?
6. (Original post by Hot&SpicyChicken)
Guys i have no idea what is going on here. THis is from the Jan 2016 IAL paper, do we need to know this as i dont know what to do. I got part (a) (i) but not the rest. Please help!!!!

The quadratic equationx2 – 2x + 3 = 0 has roots Į and ȕ.Without solving the equation, (a) (i) write down the value of (Į + ȕ) and the value of Įȕ (ii) show that Į2 + ȕ2 (iii) find the value of Į3 (b) (i) show that Į4 + ȕ4 (ii) find a quadratic equation which has roots = –2 + ȕ3 = (Į2 + ȕ2)2 – 2(Į ȕ)2 (5) – ȕ) and ( ȕ3(Į3 – Į) giving your answer in the form px2 + qx + r = 0 where p, q and r are integers.
No. It's not on the UK spec.

(Original post by Yunique)
I'm a sIow writer, how Iong shouId I spend on my induction questions?
10 minutes max.
7. Zacken???

(Original post by TheRandomGenius)
How would you do part c? I have done parts a and b but can't seem to find the area - the co-ordinates of Q are (27,-18)
8. (Original post by iMacJack)
Yep - silly me.
Cheers
No problem, can you help that other user with this Jan 15 area of PQS question? I'm going off for a while.
9. Can anyone help me on how to solve sigma r=0 to r=1. Someone explained it before but i couldnt fully get it. Maybe give me some examples with n=1,2,3 etc. Thanks
10. He said that he couldn't do it either

(Original post by Zacken)
No problem, can you help that other user with this Jan 15 area of PQS question? I'm going off for a while.
11. Which paper is this?
12. (Original post by iMacJack)
https://gyazo.com/bb2a0cc0002c1fdf91f31d04facbb76a

Again part b... another probably simple question in which I seem stuck on.
Which paper is this?
13. (Original post by TheRandomGenius)
He said that he couldn't do it either
This

It was really difficult for an area of a triangle question...

Maybe kingaaran will help us!
14. (Original post by Hopstano)
Which paper is this?
https://7cba9babeb0db0ff9468853e0b2d...%20Edexcel.pdf
15. (Original post by iMacJack)
This

It was really difficult for an area of a triangle question...

Maybe kingaaran will help us!
What year, what question? I'll check it out...
16. (Original post by kingaaran)
What year, what question? I'll check it out...
Jan 15 IAL F1 4C
17. Here... - part c

(Original post by kingaaran)
What year, what question? I'll check it out...
Attached Images

18. (Original post by Zacken)
Not sure what the problem is... split it up, sum the parts and get an equation:

k sum 2^r = number

remember geometric series...

I don't follow the geometric series part.

Sum of a geometric series is a(1-r^n)/1-r

In this case the mark scheme
https://7cba9babeb0db0ff9468853e0b2d...%20Edexcel.pdf

says that a is 2, but to me it is quite clearly one?
19. Could someone explain 6 (ii) (a)

Attachment 534809534811
Attached Images

20. (Original post by Nick-F007)
I don't follow the geometric series part.

Sum of a geometric series is a(1-r^n)/1-r

In this case the mark scheme
https://7cba9babeb0db0ff9468853e0b2d...%20Edexcel.pdf

says that a is 2, but to me it is quite clearly one?
sum frm r=1 to 12 of 2^r = 2^1 + 2^2 + 2^3 + ...

first term is 2^1 = 2.

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