The Student Room Group

Edexcel C2 20th May 2015 *Official Thread*

Scroll to see replies

Original post by physicsmaths
That was on my paper !


Posted from TSR Mobile


yeh I know, its the one question I didn't get
Original post by humayra.ac


thanks! exactly the type of questions I was looking for
Anyone got a link to questions my topic? Not pastpaper questions, normal questions



Posted from BEHIND YOU
Original post by AJC1997
1. Binomial expansion
2. Factor theorem
3. Trigonometric equations
4. Finding stationary points and maximum/minimum values
5. some question with a weird looking swimming pool that asks you to find the total area and/or perimeter using: length of an arc formula, area of a sector formula, cosine rule to find the length of a missing side.
6. trapezium rule
7. a question where they ask you to find the total area of a shaded region on a graph using integration
8. Logarithm question
9. equation of a circle question asks you to find the midpoint and radius
10. another weird shape involving circles and/or triangles that asks you find some angles or areas
11. Edit: forgot geometric sequences!

most of these things are likely to come up imo


Thanks!
Does anyone have any extra log questions?


Posted from TSR Mobile
Original post by LearningGeek
yeh I know, its the one question I didn't get


Note that multiplying or dividing bya negative changes inequality and reverses it.


Posted from TSR Mobile
Original post by physicsmaths
Note that multiplying or dividing bya negative changes inequality and reverses it.


Posted from TSR Mobile


yeh I get that, what I did wrong was just simplifying the initial expression
like I minused 160 from both sides then multiplied by 1/8 and yeh...just led to the wrong answer
I get it now tho, hope I get a question like that in this years paper
How do you integrate 3x^-1


Posted from TSR Mobile
Original post by 20Emily1998
How do you integrate 3x^-1


Posted from TSR Mobile


It is 3 multiplied by the integral of 1/x.

I think you'll have seen that that is ln (mod(x)).
Original post by mrchemistry
I prefer them so much more than the normal graphs! But whatever works for you, stick with that, you don't want to be getting confused this close to the exam :biggrin: Anything else you're stuck on? I'm retaking this exam as I got a C in it last year :frown: I hated logs, integration and allll that hahaha :frown: hopefully will do better this time round!


These graph questions are what get to me. I either get too few answers or too many. I'm working on it though. My other weakness is Sn and stuff, I make the silliest mistakes. I got a b when I did it, I'm aiming for an a this time.
Original post by 20Emily1998
How do you integrate 3x^-1


Posted from TSR Mobile


Isn't that just 0:s-smilie:
Original post by frozo123
yeah but you've subtracted them, you're meant to add them together


Whoops I thought I added them 🙈 thanks! :smile:
Original post by SeanFM
It is 3 multiplied by the integral of 1/x.

I think you'll have seen that that is ln (mod(x)).


so do you just get 0?
Reply 413
Avatar for Columbo97
Columbo97
OP
2
Original post by ChronicBoredom
Yeaaah


If there isn't a thread already, make one for D1, I don't take further maths, sorry!
Original post by particlestudent
Isn't that just 0:s-smilie:


I think so just wanted to double check as 3x^-1

Increase power so 3x^0 divided by 0 should be nothing, I think?


Posted from TSR Mobile
Original post by 20Emily1998
I think so just wanted to double check as 3x^-1

Increase power so 3x^0 divided by 0 should be nothing, I think?


Posted from TSR Mobile


If you divide it by 0, it would be undefined

Anyway, you dont have to worry about integrating something like 3/x. You can worry about that in c4

Posted from TSR Mobile
Original post by 20Emily1998
I think so just wanted to double check as 3x^-1

Increase power so 3x^0 divided by 0 should be nothing, I think?


Posted from TSR Mobile


I was wondering...wouldn't it be 3lnx? Because differentiating ln x gives 1/x...so differentiating 3lnx gives 3/x..which is 3x^-1. So going backwards...integral of 3/x = 3lnx?
Original post by husband material
If you divide it by 0, it would be undefined

Anyway, you dont have to worry about integrating something like 3/x. You can worry about that in c4

Posted from TSR Mobile


Okay but say if it did come up i a core 2 question would zero be correct?:smile:


Posted from TSR Mobile
Original post by 20Emily1998
Okay but say if it did come up i a core 2 question would zero be correct?:smile:


Posted from TSR Mobile


Nah,

It would be 3ln|x|

Posted from TSR Mobile
Original post by mrchemistry
I was wondering...wouldn't it be 3lnx? Because differentiating ln x gives 1/x...so differentiating 3lnx gives 3/x..which is 3x^-1. So going backwards...integral of 3/x = 3lnx?


Is that core 3 or 4 because I'm confused by your working :s-smilie:


Posted from TSR Mobile

Quick Reply

Related discussions

Latest

Trending

Trending

Articles for you