FP1 OCR Post Exam Discussion 11/06/2010

So it fills the whole circle to the right of the line and doesn't stop at
Re(z)=6?

And to my answer on whether the series converges?

heyy sorryy..

for question 3.. could you have:

1/3n (n + 1/2) ( n- 1/2)

thanks

no that isn't right

it doesn't stop at 6

what did you say about convergence?

I just said that as n increases, there is no limit to n's value as it will just get bigger and bigger, so the series does not converge.

Thanks again!

oh.. doesnt (2n+1) = (n+1/2) though?

how many marks would you drop for that? i got the 4n^2 - 1 thingie

Try any number to see if those expressions are equal.

Drop 1 accuracy mark if everything else was right.

How many would I drop for 2/3n(2n+1)(n-1/2)?

Cheers for the answers by the way.

Mr M, what is 100 UMS usually - what do you reckon it will be?

lose 1 mark for putting 2 + i and 2 - i for 10 part i ? (instead of just one)

that is good enough at this level

What do you reckon about the general difficulty of this paper? I personally found Question 10 slightly more challenging than past papers. Also, in question 10, I got one silly error right in the beginning where I did a - instead of a + by mistake, leading to all of my answers being wrong, but the method being fully correct, how many marks do you reckon I will get for that?? Thanks!

Did you not notice when you cubed it?

Lose one accuracy mark for each part I expect.

It seemed an average difficulty paper to me.