Edexcel Core 3 - 21st June 2016 AM

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Reply 1380

squirble

Original post by jwifiuhrkoa

Q4a was not ln2.5 the answer is 0.5ln (25/4)

That is the same thing as the square root of 25/4 is 5/2 just ln 5/2 is in the simplest form

Reply 1381

dairychocolate

Original post by jwifiuhrkoa

Q4a was not ln2.5 the answer is 0.5ln (25/4)

Pretty sure the answer would be ln2.5. That is simpler than 0.5ln(25/4)

Reply 1382

k.russell

hold up, what was 3c? I can't remember doing a 3c but I also may just be panicking because I've seen other people saying they missed it out... What was the question?

Reply 1383

Whizbox

Original post by jwifiuhrkoa

Q4a was not ln2.5 the answer is 0.5ln (25/4)

They're exactly the same, ln2.5 is the simplified version

Reply 1384

BSLMaths

Original post by SaxyBeast98

How many marks was question 1?

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Reply 1385

QueenOfNachos

Any predictions for 100 UMS?

Reply 1386

heyitskim

If I put y=25 instead of k=25 for the asymptote, will I get the mark?

Reply 1387

Aerosmith

Original post by Yua

you've made an error, that is impossible

yep I made a mistake. alright

Reply 1388

pineneedles

Original post by rk_

i also couldn't find the sign change. I had the interval as [1.2565,1.2575] *something like that* but couldn't get a sign change ANYWHERE!!!! :angry:

You were probably putting the numbers in the wrong equation, you had to put them in g(x) = 2x +7 (can't remember what it was), not g(x). I was getting so angry at that question then I realised XD

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Reply 1389

Danielgeen_

Original post by jwifiuhrkoa

Q4a was not ln2.5 the answer is 0.5ln (25/4)

That's the same thing because 0.5ln(25/4) = ln(25/4)^0.5 which equals ln(5/2)

Reply 1390

AhnafR

Guys for 4a) i wrote x=1/2ln(25/4) instead of ln5/2. Did it say to simplify and how many marks would i lose?

Reply 1391

psychemma

What was question 1a again?

Reply 1392

Elm Tree

Original post by Reda2

I thought I could do all questions but I didn't!! Exams are simply not for me...

For my minimum grade predictions I need now A in C4 for overall B, or for my maximum marks I got, I will need overall B in C4 for overall B.

My days, pissed me off. How did you FLIPPIN do the question after you proved cotx? I just could not simplify it!

1+cot^2x=cosec^2x

Reply 1393

Christop

Chief examiner: "what kinda exam you want fam"

Edexcel: "just **** my **** up"

Reply 1394

Ainsleyy

Oh man oh man question 9 was hard at the end. Out of the last 6 marks theres no way I got more than 2. :frown:

Otherwise this paper wasnt insane but it was hard and I did find I was super short on time which I never normally am anyone else?

Reply 1395

mpwb12345

Original post by Yua

someone get me the paper and i'll make a MS

Will send u it

Reply 1396

Serine Soul

I got too stuck on the last question, hopefully I'll get at least one method mark

With that in mind, I think I lost about 4 marks. Praying that it's at least 95 UMS :colondollar:

Reply 1397

Daniaal

Original post by Ainsleyy

Yeh tan4x = something with a 3 and a 4. I think I got the same aswell. 0.16...

For that question the range was from pi/4 to pi/2 so 0.16 was out of the range the real answer was 0.86 or something like that.

Reply 1398

ThatExamWas

Okay i started the cot2x question, got halfway and then did B because i got stuck... i went back to it but ran out of room so I wrotr "continued on the next page." On thr next page i continued from where I left off... I got to the answer but idk whether they'd allow this.