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STEP 2013 Solutions

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Just a quick note about the end (part (iii)) of question 7.

in part (i) you have the solution x=17,y=12

using part (ii) this gives m=8,n=6 which means 6^2=1/2x8x(8+1) which is exactly what you are looking for...giving you the solution a=28,b=8,c=6

Reply 41

Jkn

Original post by cpdavis

Why yes, I knew I forgot something :tongue:

will update solution later today in addition to the original OP. and will also stick in a sketch too :h:

also, did someone do a complete solution to Q3? I've not had a chance to look at solutions as I'm finishing off my work for supervisor :ahee:

Cheers

Reply 42

Slowbro93

OP updated! Only missing solution is 3 :tongue:

Reply 43

mikelbird

Will this do for Q3??

Step2013Paper2Question3.pdf71.4KB

Reply 44

mathsymathsy

Original post by DJMayes

Damn. When I did the question I missed the "hence find". However, I had x as 3 and y=2 as my first solution, so would this likely lose marks?

Maybe just 1 mark? since it's very easy to deduce another solution. dw, you will still get the S :rolleyes:

Reply 45

talstactician

What time are we allowed to discuss/post solutions for STEP I? Also if we post a solution, does it have be done using LaTeX? I have never used it before, but I'd like to post my solution to STEP I Q1 on here...

Posted from TSR Mobile

Reply 46

username937760

Original post by talstactician

No discussion until 1 pm tomorrow.

Reply 47

talstactician

Original post by DJMayes

No discussion until 1 pm tomorrow.

Ok thanks, and is it ok if my solution isn't done in LaTeX?

Posted from TSR Mobile

Reply 48

Slowbro93

Original post by talstactician

Ok thanks, and is it ok if my solution isn't done in LaTeX?

Posted from TSR Mobile

That all depends on how clear your handwriting is :tongue:

Reply 49

talstactician

Original post by cpdavis

That all depends on how clear your handwriting is :tongue:

I was going to write out my solution manually on TSR, rather than upload a link to my working on paper, but I can scan it in if you'd like :smile:

Posted from TSR Mobile

Reply 50

username937760

Original post by talstactician

Ok thanks, and is it ok if my solution isn't done in LaTeX?

Posted from TSR Mobile

I think it's generally preferred in LateX, but you can still post it up raw and hopefully someone will Tex it for you.

Reply 51

HClO

STEP I 2013 Q12

(i)

Spoiler

(ii)

Spoiler

(iii)

Spoiler

(edited 10 years ago)

Reply 52

username937760

Mechanics section for STEP 1:

Q9 – STEP I

Spoiler

Q10 – STEP 1

Spoiler

Q11 – STEP I

Spoiler

(edited 10 years ago)

Reply 53

Mastermind2

STEP I 2013 Question 7:

Spoiler

(edited 10 years ago)

Reply 54

Vaz_Tê

I used the substitution y=(x^2)(u) and it worked, though I might have made a mistake. I'll have to see the paper again.

Reply 55

MathsNerd1

Original post by Vaz_Tê

I used the substitution y=(x^2)(u) and it worked, though I might have made a mistake. I'll have to see the paper again.

I also used this solution so I hope its not wrong :redface:

Reply 56

Mastermind2

Original post by MathsNerd1

I also used this solution so I hope its not wrong :redface:

Did you get the same final solution as me?

Reply 57

MathsNerd1

Original post by Mastermind2

Did you get the same final solution as me?

I got my value of c being 6 so I don't think it was the same at all :-/ I'm really doubting my performance in this paper now :redface:

Reply 58

Mastermind2

Original post by MathsNerd1

I got my value of c being 6 so I don't think it was the same at all :-/ I'm really doubting my performance in this paper now :redface:

I don't remember what I did in the exam tbh, my answer might have been different to what I put here.

Reply 59

GeneralOJB

What do you think the boundaries will be for STEP 1? I thought it was a really nice paper, managed to get five and a half solutions. Would be really nice to get a grade 1 in lower 6th.