Edexcel C3,C4 June 2013 Thread

Reply 1980

Biology2112

y= e^-2x / (x+1)^0.5. What's dy/dx?
how do you solve that using both quotient and product rule

Reply 1981

MedMed12

21

Original post by ytop2

Can someone just help me pass c4 :frown:

why, what are you stuck on? use exam solutions -its amazing! its the reason I dont need teachers :P haha I just watch that before the lesson and thendo the chapter in the textbook
Start with integration as thats usually 30ish marks in total on the paper

im sure you can do partial fractions
differentation is pretty nice - dy/dx
parametrics-are ok

vectors and integration are the killer one -but attempt to know ATLEAST half of it so you can be fine.
I think by parts and trapzium rule aren't too bad
integration to find area is same as AS- volume and substitution tend to be the hard ones and the equations in context

vectors- finding the line, angle and intersection point is fine, but usually part d/e is the hard bit :smile:

what are you needing to get in Maths/aiming for/predicted? :smile:

honestly, break it down, c4 is nicer than c3 (unless you prefer trig) :tongue:

Reply 1982

MedMed12

21

Original post by HARDZ994

Is one week enough to cover all c3 past papers (Solomon too) ?
( I haven't started :confused:

)

focus on half solomon and half C3- I'm just doing c3 ones as I have 2 other subjects next week too and can't deal with solomon any more :frown:

Reply 1983

ytop2

1

Original post by MedMed12

why, what are you stuck on? use exam solutions -its amazing! its the reason I dont need teachers :P haha I just watch that before the lesson and thendo the chapter in the textbook
Start with integration as thats usually 30ish marks in total on the paper

im sure you can do partial fractions
differentation is pretty nice - dy/dx
parametrics-are ok

vectors and integration are the killer one -but attempt to know ATLEAST half of it so you can be fine.
I think by parts and trapzium rule aren't too bad
integration to find area is same as AS- volume and substitution tend to be the hard ones and the equations in context

vectors- finding the line, angle and intersection point is fine, but usually part d/e is the hard bit :smile:

what are you needing to get in Maths/aiming for/predicted? :smile:

honestly, break it down, c4 is nicer than c3 (unless you prefer trig) :tongue:

Oh thanks!! I'll definitely use exam solutions... I need to get an A to get into my uni, I got 85 ums in C3 and was originally aiming for an a* in c4 but now it's looking very unlikely ... it's just vectors and integration that really get me..

Reply 1984

Biology2112

Original post by nm786

make

Unparseable latex formula:

u = e^-^2^x

Unparseable latex formula:

v=x^0^.^5 +1

and use quotient rule? You don't have to use product rule.

It's (x+1)^1/2

Reply 1985

ACBLISS

Original post by MedMed12

focus on half solomon and half C3- I'm just doing c3 ones as I have 2 other subjects next week too and can't deal with solomon any more :frown:

"sigh" such a weirdo

Reply 1986

nm786

2

Original post by Biology2112

It's (x+1)^1/2

oh sorry then use the quotient rule with

Unparseable latex formula:

u = e^-^2^x

and

Unparseable latex formula:

v=(x+1)^1^/^2

(use chain rule for v)

(edited 10 years ago)

Reply 1987

Better

OP

8

Going through C3 Papers relatively quickly now. On June 2010. Hopefully I can get up to Jan 13, by the end of Thursday.

For some reason I have an irrational fear of the C4 papers after doing all those Solomon Press....

I just want to get through this C3/C4 work ASAP so I can focus on how to get those A/A*s in Chemistry and Physics. The grade boundaries are so tight in Chemistry it's unreal.

Reply 1988

Mystogan.

When dealing with questions such as Express 5cosx + 8sinx in the form Rcos(x - theta) do we use the unrounded value or the rounded value of theta in the subsequent parts? (not sure if that has been asked before)

Reply 1989

L'Evil Fish

18

Original post by Mystogan.

When dealing with questions such as Express 5cosx + 8sinx in the form Rcos(x - theta) do we use the unrounded value or the rounded value of theta in the subsequent parts? (not sure if that has been asked before)