Maths C3 questions

I just had a couple of questions to ask you from one of the C3 Solomon papers that I did today:

1) Question 3b) from here:

http://www.school-portal.co.uk/GroupDownloadFile.asp?GroupId=1152244&ResourceId=3992025

Would we be asked something like this in the real exam?

2) Also, on question 5a) from the exact same paper, I sketched the graph in but I put in only two 'curve things' , I didn't put in the third curve. If you look at the mark scheme (below), it will be a bit more clear what I am talking about. Would this be an issue? Other than that I sketched in both of the other two curves, the coordinates of the stationary points as given in the MS and also the equations of the asymptotes, would that have been enough to pick up all the 5 marks? Also if you don't mind me asking do you know where the third curve comes from ? My usual method is to draw the graph of sec x and then to work out what happens as the transformations are taking place? Is there an easier method? Thanks.

http://www.school-portal.co.uk/GroupDownloadFile.asp?GroupId=1152244&ResourceId=3992013
thanks!

I just had a couple of questions to ask you from one of the C3 Solomon papers that I did today:

1) Question 3b) from here:

http://www.school-portal.co.uk/GroupDownloadFile.asp?GroupId=1152244&ResourceId=3992025

Would we be asked something like this in the real exam?

2) Also, on question 5a) from the exact same paper, I sketched the graph in but I put in only two 'curve things' , I didn't put in the third curve. If you look at the mark scheme (below), it will be a bit more clear what I am talking about. Would this be an issue? Other than that I sketched in both of the other two curves, the coordinates of the stationary points as given in the MS and also the equations of the asymptotes, would that have been enough to pick up all the 5 marks? Also if you don't mind me asking do you know where the third curve comes from ? My usual method is to draw the graph of sec x and then to work out what happens as the transformations are taking place? Is there an easier method? Thanks.

http://www.school-portal.co.uk/GroupDownloadFile.asp?GroupId=1152244&ResourceId=3992013


thanks!

I've not seen it, though I don't see why not. . .



The third curve is there because it is $\sec(x - \frac{\pi}{6})$ not just $\sec(x)$

Hmm but??? That third curve , I still don't understand...do you have an easier method for sketching these sorts of curves because when I did by my method (described in the OP) , I didn't get it? Which point gets mapped to that third curve? ANy guidance would be helpful ! thanks!

I had a go at one C4 question paper today and and I came across this question no 6:
http://www.school-portal.co.uk/GroupDownloadFile.asp?GroupId=1152243&ResourceId=3992062

Pls can you check if my working out is correct?
*integral sign* t(t+1) (-2t) dt (ON TOP OF *integral sign* I HAD 0 AND ON BOTTOM ROOT 2)
*integral sign* (-2t^3 -2t^2) dt
[-2t^4/ 4 - 2t^3/ 3 ]

Then subbing in 0 gave 0. so 0- ({6+4sqrt2}/ 3)

It's a translation of $+ \frac{\pi}{6}$ parallel to the x-axis.

The area looks good - except that it should be positive, not negative

It's a translation of $+ \frac{\pi}{6}$ parallel to the x-axis.

The area looks good - except that it should be positive, not negative

hello, so for the area question is my method right?

I just had a couple of questions to ask you from one of the C3 Solomon papers that I did today:

1) Question 3b) from here:



thanks!

That is a lovely question - you need to solve the quadratic for any value between 0 and e, as long as the number inside the log is less than e the log will be negative and yes it would be well wthin their rights to set that as a question

Are you sure about the bold?

Are you sure about the bold?

I haven't no.
Your method is correct, some prefer to do that - it really doesn't matter

pls can u comment on this question too?

http://www.thestudentroom.co.uk/showthread.php?t=2350011&p=42598332

Provided you attain the correct solution, and your working is clear and correct you probably won't be penalised

No I just wanted to know if taking logs was correct method?

Personally, I'd try to avoid having a double ln, but it's up to you

so r u saying u would rather taken logs like me?

No, for 7c) I'd have done something similar to the mark scheme.

hmm,so is taking logs incorrect in any way ? sorry it seems like i am asking the same question again and again but sorry i am not yet getting definite answers . Because i did not get double ln.