Year 12s: what will be the first way you research your future options? >>

C1 May 2011 Edexcel - Tips, Model answers, Solutions in the FIRST POST

Scroll to see replies

Reply 80

intellectual1

Original post by lonely_cupid

can someone tell me if circle theorem is in C1 or not? I haven't really come across it in the past papers...

No that is in C2, which is'nt until the 26th May! :smile:

I think you may be referring to the the normal and tangent which is in C1.

Reply 81

mintmocha

Original post by Expendable

So -1/X would be in the opposite quadrants? What about x/2 [or others

It is a diagonal line.
y= 1/2 x

Reply 82

letsdothetimewarpagain

Thread closed until after time limit has passed. Good luck guys.

Reply 83

LadySmythe

Bump. Just letting you guy know the thread's open for discussion now :smile:

Reply 84

Expendable

Original post by Loz17

Bump. Just letting you guy know the thread's open for discussion now :smile:

1rd!!!!!!!!!!

How'd it go? I messed up the series one about k+2k+3k...100

Reply 85

username254396

Did anyone struggle with part c) of the b^2 -4ac question? Me and everyone I know who took it said they ended up square rooting -8, but that isn't possible right?

Reply 86

POWW!

It went really well until the Arithmetic series bull ****...after that things just went down hill :l

Reply 87

Mitche93

Original post by Zakky

Did anyone struggle with part c) of the b^2 -4ac question? Me and everyone I know who took it said they ended up square rooting -8, but that isn't possible right?

i didnt think it made sense

Reply 88

LadySmythe

Original post by Expendable

1rd!!!!!!!!!!

How'd it go? I messed up the series one about k+2k+3k...100

I didn't do it, was just saying it's open :smile:

Was it ok for you apart from the series? I always remember series being difficult :erm:

Reply 89

-Illmatic-

Original post by Expendable

1rd!!!!!!!!!!

How'd it go? I messed up the series one about k+2k+3k...100

That was pretty simple...

Reply 90

Liyanajamain

got first questionw rong already :frown:

i only wrote +5 for square root of 25 instead of plus minus 5

Reply 91

Arsey

model answers in first post, pretty easy paper; although the series one was unusual.

Reply 92

Masderchef

Original post by Zakky

Did anyone struggle with part c) of the b^2 -4ac question? Me and everyone I know who took it said they ended up square rooting -8, but that isn't possible right?

Yeah, I wrote 'will not square root' as my final answer because it was pissing me off.

Reply 93

Expendable

Original post by Zakky

Did anyone struggle with part c) of the b^2 -4ac question? Me and everyone I know who took it said they ended up square rooting -8, but that isn't possible right?

This is the other one [only other hopefully] I couldn't do. I think I said x=1 or x=-1 from the completed square thing and subbed that into discriminant which was greater than 0 meaning that it had real values? I put lots of random working in the hope that I could secure 1 mark for something :P

Reply 94

lonely_cupid

Original post by Expendable

1rd!!!!!!!!!!

How'd it go? I messed up the series one about k+2k+3k...100

omg same!! Also that question about the discriminant was very badly worded, well done Edexcel. :angry:

Reply 95

God Help Me

Original post by Zakky

Did anyone struggle with part c) of the b^2 -4ac question? Me and everyone I know who took it said they ended up square rooting -8, but that isn't possible right?

Yeah i got square root of -8
and I tried doing it again and againt. Nothing.

Reply 96

Fred12345

can anyone remember what they got for the simultaneous equations?

Reply 97

YingYang

Arsey what do you expect the UMS boundries to be? 75 for 100? You said i was an easy paper

Reply 98

Stormwhite

I thought it was a relatively tricky paper, for C1. Reasonably sure I got a high mark, but I'm a little iffy on the one where you had to show that k could be any value, 'cause I used a weird method. Took the discriminant of the discriminant of f(x) and showed it had no real roots yada yada.

Reply 99

icedragon

Yep, square root of -8 so surely no roots, although they said real roots? Also, what did you guys do for graph of f(x+p)? I drew the graph and gave x coords between a range of 3.