Arsey's Edexcel FP1 S14 (UK (R) IAL) Model Answers IAL added

I can't believe I thought 364/14 was 51. At the time I thought 50 14s go into 350 (instead of 50 7s) and one extra 14. I panicked :sigh:

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Reply 81

A193

2

For AB I got:

( 4 5 13)
(5-6 11)
(6 11 21)

So basically the wrong order, how many marks would I lose?

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Reply 82

Darnell LD97

For the last question on divisibility by proof by induction I completely messed up and did something weird this is what i did.

f(k)=8^k-2^k
f(k+1)=8^k+1-2^k+1
f(k+1)-f(k)=8^k+1-2^k+1-(8^k-2^k)
=8^k+1-2^k+1-8^k+2^k
=8.(8^k)-2.(2^k)-8^k+2^k
=7.(8^k)-1.(2^k)
=7.8(1^K)-1.2(1^K)
=56(1^K)-2(1^K)
=54(1^K)
=6.(9)(1^K)

Reply 83

rachelc142

11

Thank you so much !!

From what I can gather the only question I dropped marks on was QUESTION ONE. How annoying hahah!

Onto M2 now then I'm done with exams ! :smile:

Reply 84

Locicero

Hi arsey, thanks again for the answers, you're amazing. Do you think it matters if I didn't use the word 'communicative' for why AB doesn't equal BA. Instead I talked about the dimensions being different of the outcome matrix

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Reply 85

Mathsforlife

1

Never revised for this paper ... Never opened the textbook aswell lol .. Other than making a slip and getting induction in last question wrong .. everything else seems good!

Reply 86

Mathsforlife

1

Original post by Darnell LD97

For the last question on divisibility by proof by induction I completely messed up and did something weird this is what i did.

f(k)=8^k-2^k
f(k+1)=8^k+1-2^k+1
f(k+1)-f(k)=8^k+1-2^k+1-(8^k-2^k)
=8^k+1-2^k+1-8^k+2^k
=8.(8^k)-2.(2^k)-8^k+2^k
=7.(8^k)-1.(2^k)
=7.8(1^K)-1.2(1^K)
=56(1^K)-2(1^K)
=54(1^K)
=6.(9)(1^K)

HAHAHA I LIKE HOW YOU WROTE 8^k = 8(1^k) ... LOL :wink:

Reply 87

Darnell LD97

Original post by Mathsforlife

HAHAHA I LIKE HOW YOU WROTE 8^k = 8(1^k) ... LOL :wink:

hahaha yh i panicked lol and i had a lack of focus at this point in the exam, but im not too bothered anyway hopefully I'll get an A in the paper although ill be happy with a B in further maths :smile:

Reply 88

username638250

7

Original post by Locicero

Hi arsey, thanks again for the answers, you're amazing. Do you think it matters if I didn't use the word 'communicative' for why AB doesn't equal BA. Instead I talked about the dimensions being different of the outcome matrix

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You mean 'non-commutative'? Lol.

Reply 89

Gome44

10

Original post by Arsey

Here are my solutions to the FP1 paper, I thought a few were quite tricky but otherwise a reasonable paper.

I would be expecting boundaries at around the June-12 level.

R and IAL to follow once I get the papers



Session100'90'80'70'60'50'40'
Jun-1375675849413325
Jan-1375706456484134
Jun-1275686153453831
Jan-1275726962554842
Jun-1175696253443628
Jan-1175706457504336
Jun-1075696255484134
Jan-1075706456494235
Jun-0975696355473931
Jan-0975696254463932

The only thing I dont understand is why question 7ii is worth 6 marks. After the exam my friend said she put 6.5 and -6.5, but the wording of the question seemed like it only wanted one answer. Could it have been -6.5??

Reply 90

username963570

21

Original post by Mathsforlife

Never revised for this paper ... Never opened the textbook aswell lol .. Other than making a slip and getting induction in last question wrong .. everything else seems good!

haha similar to me, hadn't done any FP1 work since october till the day before the exam, spent 20 minutes looking at the textbook and that was my revision for this exam :tongue:

did ok though, looking at about 62/75 with these solutions!

Reply 91

Mathsforlife

1

Original post by Fas

haha similar to me, hadn't done any FP1 work since october till the day before the exam, spent 20 minutes looking at the textbook and that was my revision for this exam :tongue:

did ok though, looking at about 62/75 with these solutions!

I always thought I could get 100 without revising .. I was wrong bout that .. Because I didn't have exam practice ended up making a error right at the end of the exam! Think I got like 72.

Reply 92

newguy101

8

4ii) I multiplied out the matrix instead of leaving it in a neat form = 0 marks?
8b) i got y=6/k = 0 marks?
9) Do I get any marks for doing it correct until starting the n=k+1 bit?

Reply 93

Geniusguy

Original post by newguy101

4ii) I multiplied out the matrix instead of leaving it in a neat form = 0 marks?
8b) i got y=6/k = 0 marks?
9) Do I get any marks for doing it correct until starting the n=k+1 bit?

4ii) You'll get all the marks for doing it that way.
8b) You'll probably get a few method marks but I can't tell how many without knowing how you got to that answer. Probably you'll get about a third of the marks.
9) You'll get 1 mark for doing the base case of n=1 correctly, but writing the assumption doesn't get any marks on its own and you won't have got any of the later marks if you could'nt prove it for n=k+1 so you'll get just 1 mark for the final question I'm afraid.

I hope that helps :smile:

Reply 94

xyz332

Original post by Braddy16

Didn't do as well as I hoped but still looking at an A at least! On Q9 I didn't get to the end of induction, will I get a mark for still putting the right conclusion or is that cheating? :colone:

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I did the same thing

Reply 95

newguy101

8

Original post by Geniusguy

4ii) You'll get all the marks for doing it that way.
8b) You'll probably get a few method marks but I can't tell how many without knowing how you got to that answer. Probably you'll get about a third of the marks.
9) You'll get 1 mark for doing the base case of n=1 correctly, but writing the assumption doesn't get any marks on its own and you won't have got any of the later marks if you could'nt prove it for n=k+1 so you'll get just 1 mark for the final question I'm afraid.

I hope that helps :smile:

Thank you buddy, that is helpful