Edexcel C3,C4 June 2013 Thread

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Original post by überambitious_ox

how do you factorise this?

image:

i know that there is the difference of two squares for quadratics, but what about cubics? is there a rule?

do we have to go through the long process of polynomial div?

a^3 - b^3 = (a-b)(a^2 + ab + b^2 )

Reply 3121

ColdHugs22

do we need to know the factor formulas?

Reply 3122

kronca

how do you sketch (x^2+1)/(x^2-1)

and work out domain/range of f^-1(x)

Reply 3123

Lol_Fish

Original post by ColdHugs22

do we need to know the factor formulas?

Pretty sure the only thing we have to remember is completing the square/difference of two squares.

Reply 3124

MathsNerd1

Original post by PoorLoser

http://www.thestudentroom.co.uk/showthread.php?t=2362486

And I'm guessing the source of that is the edexcel website.

Yes, there's a replacement paper but this doesn't mean it will be harder. As edexcel have said, the replacement papers have gone through the same processes as the originals, and are no harder/easier than the original papers.

So there really isn't anything to worry about.

Edit:

And if you don't believe edexcel, and still think they'll give a harder paper, the FP1 replacement paper was done on Monday, and most candidates found it (fairly) easy. So I doubt they'll screw you guys over :wink:

Good luck!

You didn't sit the M2 replacement one then! It wasn't very nice at all :-/

Reply 3125

ColdHugs22

Original post by Lol_Fish

Pretty sure the only thing we have to remember is completing the square/difference of two squares.

thnx
was checking the specification n it wasnt there but some websites say you have to now it so jus wanted to make sure :smile:

Reply 3126

Lol_Fish

Original post by MathsNerd1

You didn't sit the M2 replacement one then! It wasn't very nice at all :-/

The papers have always been produced in sets of 2 as a minimum per examination date, the reason they had to replace the papers was because of a suspected breach into their database, and it's good they did replace the papers, because there was a chance that some candidates had access to the papers. The replacements papers are produced by the Same examiner as the normal paper, so the difficulty is what you'll be getting either way. So don't worry : D! good luck : ) Can't wait to get this exam out the way and begin studying for my horrendous biology exam ): !

Reply 3127

Lol_Fish

Original post by ColdHugs22

thnx
was checking the specification n it wasnt there but some websites say you have to now it so jus wanted to make sure :smile:

I'm sure you don't have to know them, but just take a quick glance at them. Good luck : ) !

Reply 3128

MLogan

Come back home..have a nice nap...Start BIOL5 :|

Good Luck Guys! Lets hope this paper doesn't screw us over like M2!

Reply 3129

muf_mur

Original post by James A

I'll be contributing towards helping my fellows brahs and sisters with dropping the grade boundaries.

You shall have full support :tongue:

Reply 3130

Lol_Fish

Original post by MLogan

Come back home..have a nice nap...Start BIOL5 :|

Good Luck Guys! Lets hope this paper doesn't screw us over like M2!

Biol5 is like the cold virus, screws your head over (dry dull sensation in the head) the second it's over you're cured of the cold, and you feel so much better. I can't wait to finish that **** exam!

Reply 3131

MLogan

Original post by Lol_Fish

Biol5 is like the cold virus, screws your head over (dry dull sensation in the head) the second it's over you're cured of the cold, and you feel so much better. I can't wait to finish that **** exam!

I know! I can't wait for it to be over. I'm so scared for it but at the same time want to get it over and done with!

Reply 3132

Lol_Fish

Original post by MLogan

I know! I can't wait for it to be over. I'm so scared for it but at the same time want to get it over and done with!

exactly

Reply 3133

posthumus

I don't know why...

... but I find it odd that for f(|x|) you have to reflect everything onto the left side of the y axis

when the x values there are negative, I never knew this in Jan lol :redface: