Edexcel FP3 June 2015 - Official Thread

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Reply 780

RDPClem

I got 2 as a repeated root for all of the eigenvalues... Did anybody else get that? xD

Reply 781

nanairo

Hope the grade boundary low!!!

Reply 782

username1162972

What did people do for area?

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Reply 783

TeeEm

any more? Need a decent polling sample (min 100)
http://www.thestudentroom.co.uk/showthread.php?t=3417321

Reply 784

Gome44

Original post by physicsmaths

What did people do for area?

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0.5?

Reply 785

Emmi12345

That went terribly for me... :frown:

Also made stupid mistakes on the 'easy' questions, so things are definitely not looking up for me.
Never had an exam that's gone worse than that in my life.

Reply 786

fatart123

Spet 1hr thinking 3 was wrong lol. Pissed up a few parts of later questions because of that. Thank **** I didn't need that for an a*

Reply 787

nanairo

Original post by pengomar

I did. It wasn't that hard, just a bit long.

Sp you think the IAL paper is a bit easier?

Reply 788

pengomar

Original post by nanairo

Sp you think the IAL paper is a bit easier?

I think so

Reply 789

raff97

Original post by Gome44

0.5?

fml I think I forgot to sub in the bottom limits. I had e and stuff over e. All over the place

Reply 790

username1162972

**** i think i forgot to times by 1/2

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Reply 791

raff97

Original post by physicsmaths

**** i think i forgot to times by 1/2

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I got 1 for area of the triangle too. i had (1/2)sqrt2.e^t*sqrt2.e^-t=1

Reply 792

username1432489

Original post by physicsmaths

**** i think i forgot to times by 1/2

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On what question?!

Reply 793

username1432489

Original post by raff97

I got 1 for area of the triangle too. i had (1/2)sqrt2.e^t*sqrt2.e^-t=1

Yup I had area of OQR = 1 also, same as you're lengths also

Original post by physicsmaths

**** i think i forgot to times by 1/2

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Most people are saying 1 so I'm probably wrong :/

Reply 796

soundhippo

Original post by raff97

i got 1 for area of the triangle too. I had (1/2)sqrt2.e^t*sqrt2.e^-t=1

me toooo

Reply 797

username1162972

Original post by Gome44

Most people are saying 1 so I'm probably wrong :/

I got 1.

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Reply 798

trooken

Normalised eigenvectors if anyone's curious

For 2-√2, it was (0.5, -1/√2, 0.5)
For 2, it was (1/√2, 0, -1/√2)
For 2+√2, it was (0.5, 1/√2, 0.5)

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Reply 799

Jay-dawg

Original post by trooken

For the last question, I substituted y=mx+c into the equation of the ellipse, obtained values for x from a quadratic, worked out the corresponding values for y, then found the midpoints of X and Y in terms of c, then equated the two 'c's together to get a locus. The answer I got is not the same as what others before me posted, so is this method invalid, or did I most likely make a mistake with the algebra?

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