# Edexcel A2 C3 Mathematics 12th June 2015Watch

This discussion is closed.
3 years ago
#921
Have you came across any factor formula questions on any past papers you've done?

I remember doing 8-10x past papers back in December and rarely saw a question on it.
0
3 years ago
#922
(Original post by XxKingSniprxX)
Have you came across any factor formula questions on any past papers you've done?

I remember doing 8-10x past papers back in December and rarely saw a question on it.
The only factor formulae question I recall was on FP3. It required only C3/C4 knowledge to do, I think. But I can't remember a single one on C3.
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3 years ago
#923
(Original post by XxKingSniprxX)
Have you came across any factor formula questions on any past papers you've done?

I remember doing 8-10x past papers back in December and rarely saw a question on it.
I've seen some questions where you could use them if you wanted to but it wasn't required

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0
3 years ago
#924
https://aeb44e76c1fb598b02a447aec286...%20Edexcel.pdf

Can someone explain how to simplify the composite function on the very last question of the paper?
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3 years ago
#925
(Original post by arsenalfc97)
https://aeb44e76c1fb598b02a447aec286...%20Edexcel.pdf

Can someone explain how to simplify the composite function on the very last question of the paper?
For example, 3^log3(9)=3^2=9. The function in the question is a bit trickier but hopefully that helps.
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3 years ago
#926
(Original post by arsenalfc97)
https://aeb44e76c1fb598b02a447aec286...%20Edexcel.pdf

Can someone explain how to simplify the composite function on the very last question of the paper?
2^-x can be written as 1/2^x

sub g into f = 3/2^logbase2 x -1

2^logbase2 x = just x

when number is powered in the same base they cancel out you can try it on your calculator e.g 123^logbase123 5 = 5

1
3 years ago
#927
Whats the likeliness of going from a low B to a high A in the next 5 days ? lol
0
3 years ago
#928
(Original post by jmuz)
Whats the likeliness of going from a low B to a high A in the next 5 days ? lol
With a fair few past papers, and a lot of attention paid to weak areas (topics for which marks are lost in papers), I'd say it's doable.
The questions tend to be formulaic and predictable.
2
3 years ago
#929
(Original post by humayra.ac)
Is this a correct method - If I draw a normal sinx graph, shift it down to -5 as that is where the minimum is, then sin x is either at 0 or -3/2pi. The answer is 3/2pi - why would it not be 0

State the minimum value of 4 sin x + 3 cos x and the smallest positive value of x for which this minimum value occurs.

5 sin(x+0,64) and the min value is -5 (worked out in part a)
0
3 years ago
#930
(Original post by that________guy)

Is that what you mean? When sinx =-1 x does not equal 0
1
3 years ago
#931
(Original post by that________guy)
I haven't looked at the question, but 0 isn't classed as a positive value so it will be the next value (3pi/2), plus when sin x = -1, x doesn't equal 0
0
3 years ago
#932
is anyone else really good at c3 and really bad at c4 and knows that this c3 paper will be your worst ever and then you will miss out on your A by 1 ums if so - i feel you

on another note - revise
0
3 years ago
#933
oh lol i realised my silly mistake, thanks for clearing it up !

(Original post by somevirtualguy)
I haven't looked at the question, but 0 isn't classed as a positive value so it will be the next value (3pi/2), plus when sin x = -1, x doesn't equal 0
0
3 years ago
#934
thanks for the pic made it clear and i see where i went wrong thanks !

(Original post by Ocean3)

Is that what you mean? When sinx =-1 x does not equal 0
0
3 years ago
#935
My plan is to revise C3 for a day solid before the exam , and same for C4 and same for D1

Lol im on a C/B grade standard atm for all three

I need an A in maths this year (got 86% UMS average at AS maths so slightly less pressure) but going up 1/2 grades in a day will be like hell I hope it turns out ok

Ive calculated if I get 90% in D1 I need two mid C's in c3 and c4 .. hope it doesnt come to that would love the A*
0
3 years ago
#936
(Original post by ThePrestigeUK)
My plan is to revise C3 for a day solid before the exam , and same for C4 and same for D1

Lol im on a C/B grade standard atm for all three

I need an A in maths this year (got 86% UMS average at AS maths so slightly less pressure) but going up 1/2 grades in a day will be like hell I hope it turns out ok

Ive calculated if I get 90% in D1 I need two mid C's in c3 and c4 .. hope it doesnt come to that would love the A*
How are you for timing in C3 and C4?
Perhaps you could try papers in like 70/75 minutes to get through the steps quicker, so you have more time to go over each question in the exams.
0
3 years ago
#937
(Original post by ThePrestigeUK)
My plan is to revise C3 for a day solid before the exam , and same for C4 and same for D1

Lol im on a C/B grade standard atm for all three

I need an A in maths this year (got 86% UMS average at AS maths so slightly less pressure) but going up 1/2 grades in a day will be like hell I hope it turns out ok

Ive calculated if I get 90% in D1 I need two mid C's in c3 and c4 .. hope it doesnt come to that would love the A*
I have the exact same percentage as you and I totally messed up my M1 exam meaning (70-80 ums ish) so now C4 (consistent C grades) needs to be an A. I hope you ace that D1 exam haha
0
3 years ago
#938
(Original post by FKA Stiglitz)
How are you for timing in C3 and C4?
Perhaps you could try papers in like 70/75 minutes to get through the steps quicker, so you have more time to go over each question in the exams.
If I work quickly I can get papers done in 1hr
thats my strong point in maths I work fast

but its my downfall in d1 where 1 mistake can cost you 5 marks
0
3 years ago
#939
(Original post by Artfanatic)
I have the exact same percentage as you and I totally messed up my M1 exam meaning (70-80 ums ish) so now C4 (consistent C grades) needs to be an A. I hope you ace that D1 exam haha
Thanks hope you smash your exams too
1
3 years ago
#940
http://gyazo.com/08285872d0df0103cde73e2184be926b

how do i do ii part a? I can get an answer of arcsinx=arsincosy but that is only there allow answer, how would I get the preferred answer of arcsinx=pi/2 - y??
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