Edexcel C2 20th May 2015 Official Thread

Reply 1260

Ahsen2015

1

Has there been any log equation Questions

Posted from TSR Mobile

Reply 1261

Haych97

2

Original post by AffirmedCube

For anybody retaking like myself:

For Binomial Expansion, does it matter whether you use the common C4 method (1 + nx + n(n-1)/2! (x)^2 +...),
or do you have to specifically use the C2 nCr method?

It doesn't matter, use whichever you find easiest!

Reply 1262

frozo123

12

Original post by Chewysambe

What do I do then? It says that on page 24 in the textbook? xx

stop trolling

Reply 1263

ChronicBoredom

3

First three terms of a geometric series are 4p, (3p +15) and (5p +20) where p is a positive constant. Show that 11p^2 -10p -225=0

Someone please explain how to do this!!

Reply 1264

LearningGeek

4

Original post by Da Di Doo

Ok thank you

k.

cool.

Reply 1265

frozo123

12

Original post by ChronicBoredom

First three terms of a geometric series are 4p, (3p +15) and (5p +20) where p is a positive constant. Show that 11p^2 -10p -225=0

Someone please explain how to do this!!

(3p+15)/4p= (5p+20)/(3p+15)
solve

Reply 1266

particlestudent

13

Original post by ChronicBoredom

First three terms of a geometric series are 4p, (3p +15) and (5p +20) where p is a positive constant. Show that 11p^2 -10p -225=0

Someone please explain how to do this!!

The ration must be the same, so the jump between the 1st and the 2nd is equal to the jump between the 2 and the 3rd

3p+15/4p must be equal to 5p+20/3p+15. :smile:

Reply 1267

ST_123

5

http://qualifications.pearson.com/content/dam/pdf/International%20Advanced%20Level/Mathematics/2013/Exam%20materials/Question-paper-Paper-C12-(WMA01)-June-2014.pdf

Need help on q8 please.

Reply 1268

xLittle_Things

1

Original post by ChronicBoredom

First three terms of a geometric series are 4p, (3p +15) and (5p +20) where p is a positive constant. Show that 11p^2 -10p -225=0

Someone please explain how to do this!!

Use U2/U1 = U3/U2
so 3P+15/4P = 5P+20/3P+15
then just cross multiply and rearrange

Did this question earlier, hope this helped :smile:

EDIT: sorry didn't realize someone beat me to it, my bad :s-smilie:

(edited 8 years ago)

Reply 1269

Oz_Vessalius

1

Original post by TSR121

hey guys i have a few questions about the exam tomorrow:

1... what are the chances of the paper (c2) being harder than last year's c2 june 2014R? this one was so difficult!
2... was last year's c2 paper the 2014 or 2014R?
3... if i was to have completed all of the available c2 papers online from edexcel and repeated a few of them, however not having done any solomon papers, is there a chance i can still get an A?
4... potential grade boundaries?
5... as many people found the c1 paper last week quite difficult (however i personally didnt), is there a chance that this c2 paper will be "easier"?

good luck!!!!

1: This year's C2 will definitely be a lot harder. My teacher's seen the leaked paper and it contains some C3 stuff - they thought it would make it more of a challenge but still doable because a lot of people sitting C2 this year are also doing C3.
2: Both.
3: Nope. You need to do some C3 papers too.
4: Probably around 71.5/75 this year, scaled up to account for grade inflation in as a result of some new education policies drawn up by the new government.
5: Nope. NO chance of that at all. Sorry.

Reply 1270

Chewysambe

3

Original post by ChronicBoredom

First three terms of a geometric series are 4p, (3p +15) and (5p +20) where p is a positive constant. Show that 11p^2 -10p -225=0

Someone please explain how to do this!!

You find r

3p + 15/ 4p gives you r

5p +20/ 3p +15 gives you r

So you can set them equal to each other and solve it to get the quadratic xx good luck tomorrow <3 !!!!

Reply 1271

frozo123

12

Original post by ST_123

http://qualifications.pearson.com/content/dam/pdf/International%20Advanced%20Level/Mathematics/2013/Exam%20materials/Question-paper-Paper-C12-(WMA01)-June-2014.pdf

Need help on q8 please.

it's the 1 + nx + n(n-1)/2! expansion

Reply 1272

the north

12

Original post by Haych97

The question attached

thats some hard question ,i doubt that will come up in c2 but can u send me the answer please

Reply 1273

Sam_the-man

What formulas do I need to know off by heart?

Reply 1274

TSR121

3

Original post by Oz_Vessalius

1: This year's C2 will definitely be a lot harder. My teacher's seen the leaked paper and it contains some C3 stuff - they thought it would make it more of a challenge but still doable because a lot of people sitting C2 this year are also doing C3.
2: Both.
3: Nope. You need to do some C3 papers too.
4: Probably around 71.5/75 this year, scaled up to account for grade inflation in as a result of some new education policies drawn up by the new government.
5: Nope. NO chance of that at all. Sorry.

im sorry but what you just said sounds like rubbish - im assuming youre trying to stress us all out? theyre not going to put c3 stuff in the c2 paper seeing as the majority of those taking it arent retaking, its their first time...

and no it wasnt both papers sat last year, one was leaked...

Reply 1275

zaybun

2

Original post by Elliemay97

Hi I'm not sure how you can tell whether the estimate for the trapezium rule is an underestimate or an overestimate?

Hope this helps :P

[

Reply 1276

particlestudent

13

Say if I get sin ^2theta=1/9. Can I square root it like that to give me sintheta is equal to 1/3????

Reply 1277

Olon

2

Original post by frozo123

What part on question 6? all of it?
for 8, what do you know the length is for any point from the centre to any point to the radius?

It's a midpoint. So what next? If you could give me a straighforward answer please. :redface:

And just 6)a

(edited 8 years ago)

Reply 1278

AffirmedCube

9

Original post by Oz_Vessalius

1: This year's C2 will definitely be a lot harder. My teacher's seen the leaked paper and it contains some C3 stuff - they thought it would make it more of a challenge but still doable because a lot of people sitting C2 this year are also doing C3.

Wait, how did your teacher gain access to the leaked paper lol? And by "C3 stuff", what exactly do you mean. Technically, the examiners can only test what is on the specification for C2 and not C3, so where exactly are you drawing these conclusions from...? :s-smilie: